There are tools such as https://github.com/LiEnby/psse-decrypt that can do this now, on a PC without the need for a PSVita at all so plugins like FuckPSSE are no longer required for this.
it also claims that RW/Temp is not a standard folder, but it actually is~ the way the plugin worked was by replacing app.exe in memory with one that would just instruct the game to copy everything in /Application to /Temp, files would then be decrypted on the fly automagically by the PSM Runtime itself.
app.info is cXML just with the PSMA header, format is the same as RCO/RCS on vita,
its just compiled "app.xml", you can use any modern cXML decompiler to read it,
as it says on here; https://www.retroreversing.com/decompiling-playstation-mobile-games/
There are tools such as https://github.com/LiEnby/psse-decrypt that can do this now, on a PC without the need for a PSVita at all so plugins like FuckPSSE are no longer required for this.
it also claims that RW/Temp is not a standard folder, but it actually is~ the way the plugin worked was by replacing app.exe in memory with one that would just instruct the game to copy everything in /Application to /Temp, files would then be decrypted on the fly automagically by the PSM Runtime itself.
app.info is cXML just with the PSMA header, format is the same as RCO/RCS on vita,
its just compiled "app.xml", you can use any modern cXML decompiler to read it,
as it says on here; https://www.retroreversing.com/decompiling-playstation-mobile-games/