MAC Photoshop CS5 asking for serial. previuosly cracked

I had it cracked but now it is back in trial mode. I installed a new HD but I had a time machine of my old one. Is there a fix or do I have to delete and reinstall?
Answer #1
You have to stop the program calling home with a network firewall or host firewall
Answer #2
I have little snitch.
Answer #3
I had that happen to me from time to time (once or twice every couple of years?), tho on the PC version. Normally a reinstall, double check hosts file (most likely updated) will fix it. Not sure if MACs have a hosts file tho :p