Hello Alexey - Thank you for your kind reply. I've been trying that with not much luck.
Because my project spans GPS weeks 1973 through 1976, I first began trying to load the entire period of time covering my project. My last tests in trying to load the sp3 file was for a smaller period:
After clicking OK, a small window opens with not showing any information for a long pause, followed very quickly by a flash of information in that window before closing and then displaying no sp3 found.
This image was only on the screen for a second, and I was really lucky in snagging this screen capture.
One comment about the delivered format: they're compressed and if you use Justin's filter set to sp3, they'll be listed as legal files, but Justin won't allow them to be loaded. Consider allowing Justin either .sp3 or .sp3.Z to be loaded when the sp3 filter is selected.
Yet, I wonder why didn't Window's Explorer Search find it? Who knows?
After replacing the old Param.jdb with the one you provided, it appears that I should have exported the Reference Points as they're now missing. Something to note for next time.
In any event, the trick worked and the sp3.Z files from the internet appear to have been loaded.
I tried this several times including coverage for the entire month of November, although the progress window above did gray out looking like it was non-responsive for a short while, it eventually finished loading.