Hi Chris,
Uh huh on maintenance. We have had good help from our reseller rather than PTC itself.
Anyhow not sure if it is possible but maybe you can change your licence server to being on your own machine.
You say you are the only one using it then it makes perfect sense to have the licence server on your own workstation. If there was another person they could access the licence server on your machine assuming it is on the network. Now the tricky part. Not sure if you can request as licence server change if you are outside maintenance as the request for this is on the support page.
If company policy is that all licences must be on a specific server then I am sorry but I do not have any suggestions. Previously on the central server we used for some licences we had the very occasional glitch and need to restart the server but this might have been a couple of times a year.
Regards. Brent