Thnx for the fix. After that, I was curious if the ScummVM plugin needs to be repaired. It looked okay, but to be sure, I clicked on repair and now it's pending.
Closed the Plugin Manager window and:
After the restart of Launchbox, it looked the same. So probably it was okay in the first place, but because I removed the .dll and the folder, I wanted to be sure.
Edit: I've been playing around for a while now and I've had multiple crashes when adding a new game or adding new media.