Weird glitchy behaviour over menus

I just installed Dimension yesterday and when I open it there are strange white dots over all the menus. They disappear for a few seconds when I hover the mouse over them, but it is difficult to read or use the menus. Has anyone else had this problem? How do I fix it? 

screencapture of the issue:

https://1drv.ms/u/s!ApBN5e0GGi6thvMRcPewJtXZaS1X3g?e=TH6PLF