A few new features have been added to the program!

01 - Nov - 2022:

-added support for animated webp import
-fixed a bug where you cannot rearrange the spritesheet correctly after importing apng animations

22 - Nov - 2022:

-added support for MP4 video import and export.
You can now import an MP4 video as separate frames, arrange it into a spritesheet, export it as a gif animation, and more!
I recommend MP4 clips for up to 3 seconds, to avoid long import and export times.

-fixed a bug where unused frames may show in the preview window.