Force License Registry panel to look for Licenser Host?

Any tips to get the license registry to look for the typed-in Licenser Host? On start-up, one of our tester stations isn’t finding the licenses on our RLM license server machine (pings and connectivity, & license availability are good). The other three tester stations can find RLM and start up fine… We’ve re-installed the sw and restarted the tester station… any other ideas?