v3

added /silent and /exit

v2

v1 used compression attributes which confused sb3u. to fix files packed with v1, simply run v2 over the packed folder, and sb3u should be able to open the re-compressed files.

sb3u also serves as unpacker - if you save packed bundle in there, you should end up with the original uncompressed file.

v1

Select folder, such as abdata, or some subfolder in it - you can try just with abdata/chara to see what happens.

Re-compressing same data is harmless, as the program internally decompresses the bundle first, yielding same result if already packed. If a bundle can't be decompressed/compressed for some reason, it's left untouched.

Sound files are skipped implicitly.