If I open the game (steam version) in any mode other than the non- ue4 no options menu, the cursor shows up about 80 pixels above and to the right of where it really is. this stops me from selecting anything on the right and top edges of the screen including the buttons to save and to move to the next step of the design. have tried verifying steam files and updating the game but still have the same issue
That sounds like your mouse drivers are not quite cooperating with the game. Could you try to switch off hardware acceleration for the mouse, try another mouse, and try to run windowed mode to see if any of that changes things?