v3.0 trial messed up my licensed use of v2.5.1 for 2 cameras

[SydsVids]

I downloaded and tried version 3.0 of Sighthound, decided I didn't need to upgrade for $60, opened my old Basic v2.5.1, licensed for 2 cameras and now it'll only work for one camera. It appears the license was overwritten. Any ideas on how to make my old version work again?