I just updated R to 3.6.1 version and R Studio to 1.2.5001 (Desktop version) and the menu bar (File/Edit/Code/View...) is missing completely. After playing around with Appearances and Zoom In/Out, I found out that those buttons are somehow hidden (see my screenshot below). Looks like the buttons and my mouse don't work well together, only in R Studio. Has anyone experienced this issue and found a way to fix it? I've uninstalled and reinstalled both R and R Studio but it doesn't solve the problem. Please help!