Dear Jacki Olson.
The problem is the combination of the versions of SilverFast and PhotoShop. SilverFast version 3.80 ist very old. This version saves the serial number in a file that newer versions of PhotoShop open write protected (since PS 5.0). When we found this problem, we changed the place of the serial number.
As far as I know, there are only two solutions:
1. Use an older version of Photoshop.
2.
Upgrade you SilverFast to the current version
Best regards
Eric Flyvbjerg