Don't know about moviepass, but you should be able to go into your MyComputer, Control panel, Add/Remove programs, and delete it from there. You could also go into your program files or Start>Programs,and find its folder, either right click then hit the delete option or try and drag and drop it into your recycle bin. Give it a go, and btw WELCOME to the site. I
If it is a stubborn one that is persistant you can try doing those steps in 'Safe' mode in case it has something in it running in the background. general rule of thumb, avoid trial offers unless they come with their own 'uninstall' option, and, 'free' often has its drawbacks.
Good luck and keep us posted on the steps you have taken.
Regards.

If you go to the thread regarding 'MightyMax' removal there should be some other ideas there to consider as well.
I just re-read your post, seems you have tried the easy stuff. Try finding one of its files, right click, go to 'Properties' and click. This should give you information on the file extensions it is using. Write them down, go to Start>Search, enter that info, bring up the files and folders, right click> delete.