FF lost my library (but it's fixed now)

This was weird.

I had FF open in PaintShopPro X and I was on the web opening filters in Filter Forge, then I got an error in FF after opening Drop Shadow by Ken. I pressed "generate bug report" in the window that appeared, but nothing happened so I closed FF (by pressing on the "X" in the top right corner). Then as expected, PSP said the filter passed bad parameters. The next time I reopened FF, it displayed only "My Filters" without any of the library filter categories. I ran my "Filter Forge setup.exe" file again and after opening FF again, still no library appeared. (I even removed the program in my control panel and then again re-installed FF with the set-up program and still no library appeared.) Finally after going to the web library and opening a filter in FF there, then my library reappeared. I even then opened that Drop Shadow filter from the web library again and this time it worked fine.

So everything seems back to normal.

P.S. BTW, I also re-downloaded the FF setup.exe file before re-downloading the "Drop Shadow" filter. (I'm not sure that makes any difference, but maybe I used an even newer version when I opened/downloaded "drop shadow" the second time.)