You know, when I started this thread I had already followed some of the suggestions that are listed here, all without success.
But now, after FoxFi is again performing its' magic for me again, I think I recall seeing something that might be of help to some of you.
After I deleted my original FoxFi and re-downloaded it, the version that installed was like 1.80 or so, which I think I may have gotten from the Play Store. When that didn't work, i downloaded the add-on, again maybe from the Play Store, and again without success.
Finally after farting around for several days and becoming ever more frustrated, I once again deleted and re-installed, but this time from the Amazon appstore, and that version is 1.91.3 and it also notes the presence of the add-on when activated. And most importantly, it works as good as it did before. Wish I would have kept better track of where I visited and the version downloaded each time so I could pin this issue on this for sure.
Best regards, all.
Pyzon