http://asmodean.reverse.net/pages/exm2lib.html
key is 1232ab23478cd
keylength 0x83
https://github.com/number201724/psbfile worked on the psb file I tried (text.psb.m) but it only has UI strings
https://a.uguu.se/Yrc25VoNmEpi_h.7z even though there is source for exm2lib it is missing too much to easily recompile it so I replaced index 1's key