sigsdb Data Base File Created on Destktop?

First off, big thanks to Comodo for a great firewall and to all those who contribute to these forums. I have recently installed v3 and all has been good, but I just discovered the sigsdb data base file and was unsure of what to do with it. Is it safe to delete, if not am I able to move the location of the file. I really dont even know what it is for. Any info on this matter would be greatly appreciated. A happy new year to everyone. Thanks again.

After I posted, I know I should have searched first, I found a previous thread on this topic. Is this issue still being looked into. Should I just leave the files as is?