The program isn't working and Strucalc entire staff is missing in action!
I have the same problem
Someone on the forum posted to turn your computer clock back to before the problem and restart program. It worked for me. However it messes up mozilla browser, wont let me access email or google calendar.
So, after I opened the program I just set the clock to the correct date.
ugh, time to make a spreadsheet I guess. Man, I really need this right now!
Time to switch to Enercalc
I'll check out Enercalc. Strucalc isn't any good if the program won't run