Thanks for posting in the Community space and bringing this to our attention, conroypi.
I'm here to provide some troubleshooting steps so you can close your company file and have the File menu work.
The display or view settings on your QuickBooks Desktop (QBDT) can cause display issues. To fix this, let's modify QuickBooks DPI settings.
Here's how:
- Close QuickBooks Desktop (QBDT) and open the Windows Start menu.
- Type "QuickBooks" into the search.
- Right-click the QuickBooks icon and tick Open file location.
- In the folder, right-click the QuickBooks.exe file and select Properties.
- Go to the Compatibility tab and place a checkmark in the Disable display scaling on high DPI settings box.
- Hit Apply, then OK.
Once done, re-open QBDT to double-check. If the same thing happens, consider checking out this article and proceed to Step 2: Adjust your view preferences in QuickBooks section for more troubleshooting steps: Fix screen issues in QuickBooks Desktop.
As for your other concern, you can check this article for tips on how to optimize the performance of the desktop program: Manage your data files to fix QuickBooks Desktop performance issues.
Please keep in touch if there's anything else I can do to help you succeed with QuickBooks. I've got your back. Have a great day.