Trasher was created to assist Windows Pro Tools users in a variety of functions. To speed up the process of deleting Dae and Pro Tools prefs, along with the databases for purposes of troubleshooting were the original. More features have been added over time to help with or speed up other processes. Functions like opening Plugin Folders to move plugins or backing up Plugin Settings to move to other computers and drives, as well as backing up and restoring other functions which are common place procedures.
Using third party audio interfaces with Pro Tools is incredibly popular these days, Hooking them up is easy but configuring them up correctly requires a little inside knowledge that wont be printed in the manual.