aseprite/data/widgets/enter_license.xml

<!-- Aseprite -->
<!-- Copyright (c) 2021  Igara Studio S.A. -->
<gui i18nwarnings="false">
  <window id="enter_license" text="@.title" expansive="true">
    <box vertical="true">
      <hbox>
        <label text="@.default_message" />
        <link text="https://www.aseprite.org/download/" url="https://www.aseprite.org/download/" />
      </hbox>
      <separator text="@.license_key" left="true" horizontal="true" />
      <entry id="license_key" cell_align="horizontal" magnet="true" maxsize="17" />
      <hbox>
        <image id="icon" icon="warning_box" visible="false" />
        <label id="message" text="" expansive="true" minheight="40" />
      </hbox>
      <box horizontal="true">
        <box horizontal="true" expansive="true" />
        <box horizontal="true" homogeneous="true">
          <button text="@general.ok" id="ok_button" magnet="true" width="60" />
          <button text="@general.close" closewindow="true" />
        </box>
      </box>
    </box>
  </window>
</gui>