Despite Jay400's jinx
, it's now been four weeks and I have not been required to reenter the KeyCode since following Edgar's procedure detailed in post #91. So it seems that taking those steps has resolved the problem in my case, even after the installation of 30 new Windows updates yesterday. Hopefully this test case will help identify what needs to be changed in the standard code/installation procedure to prevent this from being an ongoing issue for other users. Thanks again for your support!