diff --git a/src/app/crash/doc_format.h b/src/app/crash/doc_format.h
index 52346056a..be47ce1f1 100644
--- a/src/app/crash/doc_format.h
+++ b/src/app/crash/doc_format.h
@@ -10,6 +10,7 @@
 
 #define DOC_FORMAT_VERSION_0     0  // Old version
 #define DOC_FORMAT_VERSION_1     1  // New version with tilesets
-#define DOC_FORMAT_VERSION_LAST  1
+#define DOC_FORMAT_VERSION_2     2  // Version 2 adds custom properties to user data
+#define DOC_FORMAT_VERSION_LAST  2
 
 #endif
diff --git a/src/app/crash/read_document.cpp b/src/app/crash/read_document.cpp
index 5799bb66d..45646d547 100644
--- a/src/app/crash/read_document.cpp
+++ b/src/app/crash/read_document.cpp
@@ -385,7 +385,7 @@ private:
 
     // Read Sprite User Data
     if (!s.eof()) {
-      UserData userData = read_user_data(s);
+      UserData userData = read_user_data(s, m_docFormatVer);
       if (!userData.isEmpty())
         spr->setUserData(userData);
     }
@@ -483,7 +483,7 @@ private:
     }
 
     if (lay) {
-      UserData userData = read_user_data(s);
+      UserData userData = read_user_data(s, m_docFormatVer);
       lay->setUserData(userData);
       return lay.release();
     }
@@ -496,7 +496,7 @@ private:
   }
 
   CelData* readCelData(std::ifstream& s) {
-    return read_celdata(s, this, false);
+    return read_celdata(s, this, false, m_docFormatVer);
   }
 
   Image* readImage(std::ifstream& s) {
@@ -508,16 +508,15 @@ private:
   }
 
   Tileset* readTileset(std::ifstream& s) {
-    bool isOldVersion = false;
-    Tileset* tileset = read_tileset(s, m_sprite, false, &isOldVersion);
-    if (tileset && isOldVersion)
+    uint32_t tilesetVer;
+    Tileset* tileset = read_tileset(s, m_sprite, false, &tilesetVer, m_docFormatVer);
+    if (tileset && tilesetVer < TILESET_VER1)
       m_updateOldTilemapWithTileset.insert(tileset->id());
     return tileset;
   }
 
   Tag* readTag(std::ifstream& s) {
-    const bool oldVersion = (m_docFormatVer < DOC_FORMAT_VERSION_1);
-    return read_tag(s, false, oldVersion);
+    return read_tag(s, false, m_docFormatVer);
   }
 
   Slice* readSlice(std::ifstream& s) {
diff --git a/src/doc/cel_data_io.cpp b/src/doc/cel_data_io.cpp
index ca5f5124b..13551035e 100644
--- a/src/doc/cel_data_io.cpp
+++ b/src/doc/cel_data_io.cpp
@@ -50,7 +50,7 @@ void write_celdata(std::ostream& os, const CelData* celdata)
   }
 }
 
-CelData* read_celdata(std::istream& is, SubObjectsIO* subObjects, bool setId)
+CelData* read_celdata(std::istream& is, SubObjectsIO* subObjects, const bool setId, const int docFormatVer)
 {
   ObjectId id = read32(is);
   int x = read32(is);
@@ -59,7 +59,7 @@ CelData* read_celdata(std::istream& is, SubObjectsIO* subObjects, bool setId)
   int h = read32(is);
   int opacity = read8(is);
   ObjectId imageId = read32(is);
-  UserData userData = read_user_data(is);
+  UserData userData = read_user_data(is, docFormatVer);
   gfx::RectF boundsF;
 
   // Extra fields
diff --git a/src/doc/cel_data_io.h b/src/doc/cel_data_io.h
index a41e9ebe8..102f38819 100644
--- a/src/doc/cel_data_io.h
+++ b/src/doc/cel_data_io.h
@@ -8,6 +8,8 @@
 #define DOC_CEL_DATA_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
+
 #include <iosfwd>
 
 namespace doc {
@@ -16,7 +18,7 @@ namespace doc {
   class SubObjectsIO;
 
   void write_celdata(std::ostream& os, const CelData* cel);
-  CelData* read_celdata(std::istream& is, SubObjectsIO* subObjects, bool setId = true);
+  CelData* read_celdata(std::istream& is, SubObjectsIO* subObjects, const bool setId = true, const int read_celdata = DOC_FORMAT_VERSION_LAST);
 
 } // namespace doc
 
diff --git a/src/doc/layer_io.cpp b/src/doc/layer_io.cpp
index 3c7d76979..4a18e4a80 100644
--- a/src/doc/layer_io.cpp
+++ b/src/doc/layer_io.cpp
@@ -110,7 +110,7 @@ void write_layer(std::ostream& os, const Layer* layer)
   write_user_data(os, layer->userData());
 }
 
-Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects)
+Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects, const int docFormatVer)
 {
   ObjectId id = read32(is);
   std::string name = read_string(is);
@@ -147,7 +147,7 @@ Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects)
       // Read celdatas
       int celdatas = read16(is);
       for (int c=0; c<celdatas; ++c) {
-        CelDataRef celdata(read_celdata(is, subObjects));
+        CelDataRef celdata(read_celdata(is, subObjects, true, docFormatVer));
         subObjects->addCelDataRef(celdata);
       }
 
@@ -190,7 +190,7 @@ Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects)
 
   }
 
-  UserData userData = read_user_data(is);
+  UserData userData = read_user_data(is, docFormatVer);
 
   if (layer) {
     layer->setName(name);
diff --git a/src/doc/layer_io.h b/src/doc/layer_io.h
index 69740a696..64a0699bf 100644
--- a/src/doc/layer_io.h
+++ b/src/doc/layer_io.h
@@ -8,6 +8,7 @@
 #define DOC_LAYER_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
 #include "base/exception.h"
 
 #include <iosfwd>
@@ -23,7 +24,7 @@ namespace doc {
   };
 
   void write_layer(std::ostream& os, const Layer* layer);
-  Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects);
+  Layer* read_layer(std::istream& is, SubObjectsFromSprite* subObjects, const int docFormatVer = DOC_FORMAT_VERSION_LAST);
 
 } // namespace doc
 
diff --git a/src/doc/slice_io.cpp b/src/doc/slice_io.cpp
index af2d2e6e7..c86ac8bce 100644
--- a/src/doc/slice_io.cpp
+++ b/src/doc/slice_io.cpp
@@ -37,11 +37,11 @@ void write_slice(std::ostream& os, const Slice* slice)
   }
 }
 
-Slice* read_slice(std::istream& is, bool setId)
+Slice* read_slice(std::istream& is, const bool setId, const int docFormatVer)
 {
   ObjectId id = read32(is);
   std::string name = read_string(is);
-  UserData userData = read_user_data(is);
+  UserData userData = read_user_data(is, docFormatVer);
   size_t nkeys = read32(is);
 
   std::unique_ptr<Slice> slice(new Slice);
diff --git a/src/doc/slice_io.h b/src/doc/slice_io.h
index f550e25d6..14487e96a 100644
--- a/src/doc/slice_io.h
+++ b/src/doc/slice_io.h
@@ -8,6 +8,8 @@
 #define DOC_SLICE_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
+
 #include <iosfwd>
 
 namespace doc {
@@ -16,7 +18,7 @@ namespace doc {
   class SliceKey;
 
   void write_slice(std::ostream& os, const Slice* slice);
-  Slice* read_slice(std::istream& is, bool setId = true);
+  Slice* read_slice(std::istream& is, const bool setId = true, const int docFormatVer = DOC_FORMAT_VERSION_LAST);
 
   void write_slicekey(std::ostream& os, const SliceKey& sliceKey);
   SliceKey read_slicekey(std::istream& is);
diff --git a/src/doc/tag_io.cpp b/src/doc/tag_io.cpp
index 2818be344..56fadb7b6 100644
--- a/src/doc/tag_io.cpp
+++ b/src/doc/tag_io.cpp
@@ -39,7 +39,7 @@ void write_tag(std::ostream& os, const Tag* tag)
 
 Tag* read_tag(std::istream& is,
               const bool setId,
-              const bool oldVersion)
+              const int docFormatVer)
 {
   ObjectId id = read32(is);
   frame_t from = read32(is);
@@ -47,7 +47,7 @@ Tag* read_tag(std::istream& is,
 
   // If we are reading a session from v1.2.x, there is a color field
   color_t color;
-  if (oldVersion)
+  if (docFormatVer < DOC_FORMAT_VERSION_1)
     color = read32(is);
 
   AniDir aniDir = (AniDir)read8(is);
@@ -56,15 +56,15 @@ Tag* read_tag(std::istream& is,
 
   // If we are reading the new v1.3.x version, there is a user data with the color + text
   int repeat = 0;
-  if (!oldVersion) {
-    userData = read_user_data(is);
+  if (docFormatVer >= DOC_FORMAT_VERSION_1) {
+    userData = read_user_data(is, docFormatVer);
     repeat = read32(is);
   }
 
   auto tag = std::make_unique<Tag>(from, to);
   tag->setAniDir(aniDir);
   tag->setName(name);
-  if (oldVersion)
+  if (docFormatVer < DOC_FORMAT_VERSION_1)
     tag->setColor(color);
   else {
     tag->setUserData(userData);
diff --git a/src/doc/tag_io.h b/src/doc/tag_io.h
index 0e14317a1..887fb847b 100644
--- a/src/doc/tag_io.h
+++ b/src/doc/tag_io.h
@@ -9,6 +9,8 @@
 #define DOC_TAG_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
+
 #include <iosfwd>
 
 namespace doc {
@@ -18,7 +20,7 @@ namespace doc {
   void write_tag(std::ostream& os, const Tag* tag);
   Tag* read_tag(std::istream& is,
                 const bool setId = true,
-                const bool oldVersion = false);
+                const int docFormatVer = DOC_FORMAT_VERSION_LAST);
 
 } // namespace doc
 
diff --git a/src/doc/tileset_io.cpp b/src/doc/tileset_io.cpp
index f3bb8f02b..0f5987267 100644
--- a/src/doc/tileset_io.cpp
+++ b/src/doc/tileset_io.cpp
@@ -22,17 +22,6 @@
 
 #include <iostream>
 
-// Extra BYTE with special flags to check the tileset version.  This
-// field didn't exist in Aseprite v1.3-alpha3 (so read8() fails = 0)
-#define TILESET_VER1     1
-
-// Tileset has UserData now
-#define TILESET_VER2     2
-
-// Tileset name (was missing originally) + each tileset's tile has
-// UserData now
-#define TILESET_VER3     3
-
 namespace doc {
 
 using namespace base::serialization;
@@ -69,7 +58,8 @@ bool write_tileset(std::ostream& os,
 Tileset* read_tileset(std::istream& is,
                       Sprite* sprite,
                       bool setId,
-                      bool* isOldVersion)
+                      uint32_t* tilesetVer,
+                      const int docFormatVer)
 {
   ObjectId id = read32(is);
   tileset_index ntiles = read32(is);
@@ -85,21 +75,20 @@ Tileset* read_tileset(std::istream& is,
 
   // Read extra version byte after tiles
   uint32_t ver = read8(is);
+  if (tilesetVer)
+    *tilesetVer = ver;
   if (ver >= TILESET_VER1) {
-    if (isOldVersion)
-      *isOldVersion = false;
-
     tileset->setBaseIndex(1);
 
     if (ver >= TILESET_VER2) {
-      UserData userData = read_user_data(is);
+      UserData userData = read_user_data(is, docFormatVer);
       tileset->setUserData(userData);
 
       if (ver >= TILESET_VER3) {
         tileset->setName(read_string(is));
 
         for (tileset_index ti=0; ti<ntiles; ++ti) {
-          tileset->setTileData(ti, read_user_data(is));
+          tileset->setTileData(ti, read_user_data(is, docFormatVer));
         }
       }
     }
@@ -107,9 +96,6 @@ Tileset* read_tileset(std::istream& is,
   // Old tileset used in internal versions (this was added to recover
   // old files, maybe in a future we could remove this code)
   else {
-    if (isOldVersion)
-      *isOldVersion = true;
-
     fix_old_tileset(tileset);
   }
 
diff --git a/src/doc/tileset_io.h b/src/doc/tileset_io.h
index eee64ee31..63177be53 100644
--- a/src/doc/tileset_io.h
+++ b/src/doc/tileset_io.h
@@ -8,8 +8,21 @@
 #define DOC_TILESET_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
+
 #include <iosfwd>
 
+// Extra BYTE with special flags to check the tileset version.  This
+// field didn't exist in Aseprite v1.3-alpha3 (so read8() fails = 0)
+#define TILESET_VER1     1
+
+// Tileset has UserData now
+#define TILESET_VER2     2
+
+// Tileset name (was missing originally) + each tileset's tile has
+// UserData now
+#define TILESET_VER3     3
+
 namespace doc {
 
   class CancelIO;
@@ -23,7 +36,8 @@ namespace doc {
   Tileset* read_tileset(std::istream& is,
                         Sprite* sprite,
                         bool setId = true,
-                        bool* isOldVersion = nullptr);
+                        uint32_t* tilesetVer = nullptr,
+                        const int docFormatVer = DOC_FORMAT_VERSION_LAST);
 
 } // namespace doc
 
diff --git a/src/doc/user_data_io.cpp b/src/doc/user_data_io.cpp
index 3b9d416e6..94573d256 100644
--- a/src/doc/user_data_io.cpp
+++ b/src/doc/user_data_io.cpp
@@ -244,7 +244,7 @@ static UserData::PropertiesMaps read_properties_maps(std::istream& is)
   return propertiesMaps;
 }
 
-UserData read_user_data(std::istream& is)
+UserData read_user_data(std::istream& is, const int docFormatVer)
 {
   UserData userData;
   userData.setText(read_string(is));
@@ -255,7 +255,12 @@ UserData read_user_data(std::istream& is)
   // 0xffffffff in 32-bit).
   if (!is.eof()) {
     userData.setColor(read32(is));
-    userData.propertiesMaps() = read_properties_maps(is);
+    // When recovering a session from an old Aseprite version, we need
+    // to skip reading the parts that it doesn't contains. Otherwise
+    // it is very likely to fail.
+    if (docFormatVer >= DOC_FORMAT_VERSION_2) {
+      userData.propertiesMaps() = read_properties_maps(is);
+    }
   }
   return userData;
 }
diff --git a/src/doc/user_data_io.h b/src/doc/user_data_io.h
index de0b06cd8..f5abcfd3f 100644
--- a/src/doc/user_data_io.h
+++ b/src/doc/user_data_io.h
@@ -8,6 +8,8 @@
 #define DOC_USER_DATA_IO_H_INCLUDED
 #pragma once
 
+#include "app/crash/doc_format.h"
+
 #include <iosfwd>
 
 namespace doc {
@@ -15,7 +17,7 @@ namespace doc {
   class UserData;
 
   void write_user_data(std::ostream& os, const UserData& userData);
-  UserData read_user_data(std::istream& is);
+  UserData read_user_data(std::istream& is, const int docFormatVer = DOC_FORMAT_VERSION_LAST);
 
 } // namespace doc