Just downloaded a new version of Vertex Tools. How do I install serial number with the Extension Manager?
I see that you got the free trial version from Extension Warehouse. Did you go on to buy the extension directly with EvilEmpireSoftware? If you did, check their support page, where one of the links on the right lets you recover your purchase from your email address:
I did purchase and used my serial. No issues there. The mistake I made, was that I was trying to select with the Vertex Tools pointer GROUPS. That doesn’t work, now I remember! Silly me.