@Prismaticette There was a problem where having your save operation interrupted will result in the structure file to become corrupted. It will be fixed for the upcoming release 0.6.2.
We also have been dealing with another case as of yesterday, very similar to yours where some frames were lost, which has to do with how the files are being opened by the program. The devs are looking into it as we speak actually and I believe they pushed a fix to test if it solves the problem in the long run.
For now please don’t try to open the same file, or any file, in rapid succession (that is, pressing open recent or open, loading a file, and if its blank, then try to load it again) as the issue appears to be related to the loading of the file too.
The workaround Instead for loading a file is: IF you just started out the program, you can open the first file if your work session normally, but if you were working on another file, press “File > New File” first and then use the loading commands to bring your file.
What is happening is that if you load the files quickly the temporary files will not be created in the temp folder of your OS, so the file that you load appears blank while in reality it is not, it’s just that it can’t read anything because nothing was extracted from the PCLX / ZIP file.
Sadly if the frames are not saved inside the project file there’s little hope to recover them but as a last resort you can try out this guide I made on the following comment: