Mark, I cleared your record. You hit 100 installs since June 16, 2008, that's averaging 25 moves per month, or
about 1 a day.
The "auto-remove" feature is not intended to handle constant moving back and forth between multiple computers. This ties up our Registration script and server. We don't have provisions to charge for "overuse", but we can prevent abuse as you have experienced.
We have a forced limit at 100 that triggers to show when someone is abusing the feature.
If you need to move this often, you need to buy another copy of Hoster for your 4 computers.
If we are wrong in our assessment of how you are using Hoster, please post here to help us understand.
We do appreciate you as a customer and though we had our security system set up to be transparent to users.