Free Edition license wrongly assigned

Free Edition license wrongly assigned

Hello! I'm trying to use BDRSuite free edition. I have two Hyper-V hosts. I installed BDR Server on one of them and assigned all 10 free Hyper-V VM licenses to it. Then I realized that I need to install another server on the second host (because each server should access it's host's local storage for backups). Both servers are registered in the portal. Now I can't figure out how to re-assign unused free licenses to the second server, so that each server has 5 licenses.
Please help.