Reflashing OpentpCast

Hei.
I bought used tpcast from 3. person and was told that it has license. how to do i reflash to opentpcast without buying new license?
Note: If you are reflashing a previously upgraded TPCast device and have already purchased a TPCast VirtualHere licence, you do not need to purchase a new licence and can skip this section. this was on the guide.

do i need to ask the owener of the license to send me the key or what?
was also mention from the seller that the key was embedded with software or cloud something, could not remember.

#2

Just do this, install opentcpcast , then start the virtualhere client when you see the TPCast listed, right click USB Hubs->License...->Copy to clipboard and paste into an email to mail [at] virtualhere.com (mail[at]virtualhere[dot]com)