This is the list with usual questions I (may) get for Licenses, applied to plugins:
Q: I see extra domains in my list. What to do?
A: Seems somebody knows your password and install you plugin somewhere else. So first change your site's password. Then just delete the extra domains. Keep your password safe.
Q: I am returning customer, but not all plugins prises are lowered for me. Why this?
A: As for now not all pliugins are capable to run with the new license. I will fix them at the next version release. As for now they come with their old licenses.
Any other problems? Ask me, I will answer.