It could be opening the window outside of viewable area. Try reloading the UI and not preserving window positions (should be a checkbox). If that doesn't work try changing resolution. Worst case, delete or rename your ini file and that should revert everything to default.
There's also no need to run the installer to move the game to a new system. You can just copy it over to your new box and it should work fine - but you may have to rename your ini file due to the new system having a different default resolution or aspect ratio.
-Mcoy
|