@pashedmotatoes Hi. Sorry to hear you had this issue. Unfortunately interrupting a saving procedure can indeed lead to data corruption.
The only good thing here is that since Pencil2D crashes it is highly likely that you can recover your work.
Edit: Ok I’ve edited the main guide for recovery with images and all for ease of use, please take a look at it. I’ve tried to make it as clear as possible so you can find the temporary files folder on your first try:
Make sure you take your time looking for this folder as it is highly likely it’s there due to Pencil2D crashing, and this will improve your recovery chances.
If by any stretch you can’t find this or it has been deleted, please also share the corrupted file with us using a file sharing site.
To share your file, please use either wetransfer.com (anonymous link option, will be deleted in 1 week - see guide below)
or Google Drive
Upload the file there so you can share an anonymous link with us to see how we can help recover whatever is still inside the file.