[Installed new update today; now app won't open]

Thanks.  I reinstalled on C: and all is now well.  

Thank you for your quick replies!

[Installed new update today; now app won't open]

Thank you.  I did change compatibility mode when I was first trying to get the program to work again.  Oddly, when I checked on compatibility in the two locations you specified, everything was unchecked already.

As for the location, I have a lousy small electronic hard drive C (this PC was made when there was a shortage of physical hard drives), so I recently uninstalled and reinstalled some programs to an alternative location in D.  Would that really make a difference?  As I recall, i was able to open and run a scan on Malwarebytes Anti-malware after I did that.  In any case, I'm will to uninstall on D.  Could you provide me a link to download the most recent paid version?  (I can provide ID and key, if needed.)

[Installed new update today; now app won't open]

I was alerted to a new update on my Windows 10 PC.  Install was successful.  Now the app won't open.  I'm getting the error message "unable to connect to service."  Yes, my internet connection is fine.

Advice?

 

mb-check-results.zip