Corrupted .tnz files?

[Phoen Fox]

I recently updated my OpenToonz but when I try to open an old animation .tnz file it seems to be corrupted. I backed up the files before updating but those don't work either. When I open the files the frames show up red letters and numbers in the column. (See attached image).

[Rodney]

This is an unfortunate result of the update.

Those Levels should be in your old Stuff directory (C:\OpenToonz 1.0 stuff) whereas the current Project is pointing to the new directory (C:\OpenToonz 1.1 stuff).

There are several ways to get those links reconnected but if you only have a few missing you can click on that (red) cell, navigate to your old directry and locate the files.  The files are very likely either in a project root you created or (more likely) in the Sandbox inside the Drawings folder.