Okay, ya'll, I'm back. Looks like this issue has stirred up some discussion; it's also taught me quite a bit about "pamuters" (my son's word) that I hadn't learned yet.
I've scanned most of the 52 flagged & quarantined files what Avast! flagged as Trojan Horses, and as VirusTotal scans the file the only system that indicates that these files are Trojan Horses is Avast!.
The screen gives what appears to be basic file info, like file size, etc., then lists all of the scanning systems used. At the bottom is says (0 exports).
Any other info I can share here? Let me know.
To me, this begs the question: was there a recent Avast! update that is now seeing these files as Trojans, when older versions didn't? I'm thinking that I need to make the changes to have Avast! ignore them in future scans. It appears to me that most or all of these "Trojan" false alarms actually serve some purpose, so at this point, I guess I'll leave them for now; I may go through and kill 'em all later. It appears I've got a lot of "housecleaning" to do. I'll wait for everyone's advice before I decide on anything.
Thanks for all your help, everyone.
thx - cpr