Top level menus invisible

Hi. I have CorelDRAW X5 running on a first generation Microsoft Surface Pro. For some reason, the top-level categories for the drop down menus are invisible (see graphic). If I hover the cursor over them that particular menu choice will be visible, and iif I click on it it will stay visible. But it's only one at a time and if I'm not hovering or lcicking it's invisible and annoying. It's not necessarily keeping me from doing anything, but I have to hunt a little bit each time I want to search for a command or whatever

Any ideas what's going on and more importantly, how to fix it?