Or better yet, make a list of default handlers ie .log, .awk, .ps, .c .bas .etc that if not listed in windows registry, treat it as a text file. I get "Searching using standard method, but the search string doesn't show up in that file.

Maybe then, why show a result if a search was successful with standard method?

Status bar (png below) command path is incomplete. Also, the xlsx handler seems present, and green. What should I change?

Sometimes the Explorer file handler has multiple options like 7Z or WinRAR for archives. Why do I have to edit the registry to change the preference in your app?

Thanks for replying. You still didn't reply to the purpose and difficulty.
I was searching for a string that I knew could show up in text files (*.log and others) as well as xlsx. The error messages about THOSE files didn't make sense, nor should I have to edit a registry to use a program. The red error message (attachment) implied that there were problems with the handlers.

Uninstalled, as I can't get work done with the software. Steve would have fired you. 46 years of writing software under my belt.