I posted a similar issue this morning - and that post has disappeared.... I thought I had a v4 key in my email - did the backups, got myself a new support key - followed the instructions - and tried the v5 upgrade. The key I thought was my v4 key is probably my v3 key - and it did not like that, or ...

I have been using Blue Iris for a number of years... Since v3 and have always found it a good product, recommending it to many others... While on v4, I noticed a few issues with people upgrading to v5, so I decided to wait awhile for any issues to be sorted. Pulled the plug this week and went the up...