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I'm unable to open that file, looks malformed, with a error other than yours. Can you check?

That may because it is saving the file once open to apply any fix and as file is already malformed it saves a invalid file. Can you attach a file...

If it was a long time ago, very old versions are no longer supported and may cause problems. As file is already altered by UVtools i can't check the version...

This look related to the UI framework. When does it happen? When enter on the tool? When executing? When closing? Does it happen with other files as well?

Does not reproduce to me. Do you have any window manager utility? Dual screens? It's maximized or normal resizable window?

Thank you for the video. I will report this issue with Avalonia, maybe they can have a clue since i can't reproduce nor saw that before.

It may due lychee is using other names for keys or not dump the information at all since cws does not require that information which is crucial to UVtools. Please...

There's a bug on sanitize function which not cover this situation on partial mode. Still i can't open your file on normal mode, with a different error... I will have...

The problem seens on PNG itself, extracting layer from zip gives:  But UVtools PNG decoder detects as 2400x3840. Also lychee use 32bit PNGs while UVtools is all 8bit, but...

VLR is the closed format. OSF is the open format which is now compatible with UVtools v3.6.0+ Check if your printer accept OSF instead by slice a sample with vlare