Every so often, Prey sends me an email that auto-update has failed and I should update manually. So I go to my 3 free machines and over-install Prey, this time 1.9.1 (all Windows 10 now).
Except that now I am limited to two machines in the dashboard. When I re-install on the third machine, one of the existing machines disappears from the dashboard (without any warning or confirmation). If I re-install the one that was deleted, the new one appears and another one is deleted.
How do I install the third machine without deleting one of the others?