If you never used an older 0x90 trainer or template, then you may not have that folder. Ignore it if it's not there. The temp and work folder are the to usual ones to clear out.
Game may have patched... trainer and game version still the same? It is still early access could change at dev's whim.
Please use the update notification system to report a game patch, update or to report that the trainer may not be working with the latest version of the game. If 3 or more reports have been filed, consider BOOSTING the priority of this title for a faster turnaround on the updated trainer.