The first issue is, it somehow reorders the app order in the Alt-Tab
Details: Normally if I'm in MS Word, and I press and hold Alt-Tab, I get a menu and hit tab repeatedly to get to the application I want, say Chrome and release Alt to switch. Now if I press and release Alt-Tab, I get back to Word. Press Alt-Tab and I'm back in Chrome. It's easy to go back and forth. However TheWord always jumps to some odd position in this Alt-Tab list, and I can never Alt-Tab to toggle back and forth any more. This is a significant issue switching back and forth between MS Word and TheWord when studying.
The second issue is the application title in the Alt-Tab menu
Instead of showing up as "TheWord" with some useful info (like most other applications) in the Alt-Tab menu, it shows up as frmStartup. See picture:
This is just a cosmetic thing, but the first issue certainly seriously affects usability for me.
I put theWord on a computer at work running Windows 10 1903 (May 2019 Update) and it also works correctly. I wonder if it's a Windows issue that was corrected in that release, or possibly a plugin or app? (I'm pretty sure I tested this on both of my Windows 10 computers at home). I'll do further testing tonight.