MultiMC5/launcher/ui/pages/instance/LegacyUpgradePage.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>LegacyUpgradePage</class>
 <widget class="QWidget" name="LegacyUpgradePage">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>546</width>
    <height>405</height>
   </rect>
  </property>
  <layout class="QVBoxLayout" name="verticalLayout_5">
   <property name="leftMargin">
    <number>0</number>
   </property>
   <property name="topMargin">
    <number>0</number>
   </property>
   <property name="rightMargin">
    <number>0</number>
   </property>
   <property name="bottomMargin">
    <number>0</number>
   </property>
   <item>
    <widget class="QTextBrowser" name="textBrowser">
     <property name="html">
      <string>&lt;html&gt;&lt;body&gt;&lt;h1&gt;Upgrade is required&lt;/h1&gt;&lt;p&gt;MultiMC now supports old Minecraft versions and all the required features in the new (OneSix) instance format. As a consequence, the old (Legacy) format has been entirely disabled and old instances need to be upgraded.&lt;/p&gt;&lt;p&gt;The upgrade will create a new instance with the same contents as the current one, in the new format. The original instance will remain untouched, in case anything goes wrong in the process.&lt;/p&gt;&lt;p&gt;Please report any issues on our &lt;a href=&quot;https://github.com/MultiMC/Launcher/issues&quot;&gt;github issues page&lt;/a&gt;.&lt;/p&gt;&lt;p&gt;There is also a &lt;a href=&quot;https://discord.gg/GtPmv93&quot;&gt;discord channel for testing here&lt;/a&gt;.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
     </property>
     <property name="openExternalLinks">
      <bool>true</bool>
     </property>
    </widget>
   </item>
   <item>
    <widget class="QCommandLinkButton" name="upgradeButton">
     <property name="text">
      <string>Upgrade the instance</string>
     </property>
    </widget>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>