S4TI wont path to external hard drive

[Butterfly]

I'm very new to this. Like just downloaded it an hour ago new to this. I'm trying to fix the path to my Sims 4 folder because my game is on an external hard drive (D). However, the settings seem to freak out when I change it from my C drive where it usually is to this. I press save and nothing happens. Please help. I'm in a bind because my game has infinite loading screens and I'm trying to see if its CC thats causing it or if its an EA bug. I'm literally trying everything to fix my game and no one can help me. I was hoping this program could.