Opening old files in new version

[Patch]

All versions are available at github. To browse versions see:

• Windows Releases · Manager-io/Manager.msi · GitHub
• Apple Releases · Manager-io/Manager.dmg · GitHub
• Linux Releases · Manager-io/Manager.AppImage · GitHub

For v20.9.89, the last version which converts old data files to SQLite database see:

• Windows Release Manager 20.9.89 · Manager-io/Manager.msi · GitHub
• Apple Release Manager 20.9.89 · Manager-io/Manager.dmg · GitHub
• Linux Release 20.9.89 · Manager-io/Manager.AppImage · GitHub

Actually enough people need instructions to upgrade old data files, that this should probably be in a guide, or at least the latter 3 links and what to do with them.