I'm not sure why, but this post is now missing on the forum: https://forum.parallels.com/threads...on-doesnt-work-correctly-in-parallels.347503/ I'll endeavor to rewrite it here... I'm using ProStitcher Premium on Windows 10 Pro in Parallels. You can download the software here: https://hqprostitcher.com/software-update/ I'm using version Version 19.04.0501 (Released April 18, 2019) After installing the application, perform the following steps: 1. Click the View tab 2. Click the Grid and Ruler buttons in the View toolbar Expected result: A grid and a ruler display in the workspace Actual result: Nothing changes in the workspace You also cannot view any designs in the Workspace. They will load (I can click and select them) but they don't display at all. This exact same application on the exact same version of Windows in VMWare Fusion works perfectly. I have tried the application on three different windows installs in Parallels on two separate computers, and they all show the same symptoms. The application works on every windows install on those two computers using VMWare. I would rather not have to purchase a license for VMWare to run this application, as I use Parallels for everything else.