Add bug reports here please so they're easier to track:
https://github.com/haroldo-ok/vcs-game-maker
If your mouse has a scrollwheel, you should be able to scroll, but I'll add a scrollbar to that tab in the next release. The scrollbar on the far right should also work to scroll the contents of that tab, but I get that's a little awkward and doesn't follow the UX of the other tabs.