I opened Hero Lab today to prepare my characters for a gaming convention I am going to next weekend, and noticed there were updates to Hero Lab. After applying those updates, I got a license error saying my license was not active. I am now unable to use the many hundreds of dollars of upgrades I have paid for until this is resolved. This is also the second time this has happened, and in both instances I had made zero significant changes to my computer (I'm an IT professional, I know all about hardware signatures and significant changes in regard to licenses). It's quite frustrating to have a product which you have paid for be unavailable to you.