The NXTheme installer crashes when I launch it

This is probably due to the archive bit being set on either the app or the .nxtheme files. This is usually the result of copying files to a microSD card via a Mac. If you are experiencing this issue, try running the archive bit fixer utility via hekate for all files.

This can be done by booting into hekate and going to Tools > Arch bit • RCM Touch • Pkg1/2 > Fix Archive Bit.