Mouse sensitivity ratcheting downwards

Every time I run a particular application (a ~20 year old one, which changes the screen resolution) my mouse sensitivity is lower after I exit (and screen resolution goes back to normal). At first, I just went to Mouse Settings - Cursor Speed and increased it, but every time I ran the application I had to increase it more and more afterwards. I'm now at the limit of mouse sensitivity, and cannot increase it any further. The mouse is slower than ever. I've even doubled mouse speed using Regedit, but after using the application a few more times even that's not enough! I've also tried removing th

Question by Mich55 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.