Regarding the .tscn files, thumbnail support is actually available right now! Currently, the tool only attempts to load the thumbnail three times before skipping it, so if a scene is particularly big, it might fail within that window. As a quick workaround, you can set the number of retries to -1, which will allow for unlimited retries.
If it still doesn't load after doing that, please don't worry. I am working on figuring out a way to properly load thumbnails for large scenes with full optimization, ensuring the tool doesn't crash even when handling 1000+ scenes at once.
I will be fixing all the issues you mentioned in your feedback by the next update. Thank you for your patience, and I hope this helps!



