Upgrading from Groove Agent 1&2 to Groove Agent 4

Hi, I purchased Groove Agent 2 and later I purchased the Groove Agent 3 update when it came out. Now I am considering upgrading to Groove Agent 4, but I see that my dongle only has Groove Agent 3 on it (along with Cubase and a few other things), so I’m guessing that my upgrade to Groove Agent 3 wiped out my license of Groove Agent 2. I have a new computer that can handle the requirements of Groove Agent 4, but I also have and would like to still use my old laptop that I used Groove Agent 3 on. The old laptop does not meet the requirements of Groove Agent 4, but it runs Groove Agent 3 just fine. So, my question is, will upgrading to Groove Agent 4 wipe out my license of Groove Agent 3, or will I have both licenses? Or do I need to buy the full version of Groove Agent 4 (not the upgrade), in order to keep my old Groove Agent 3 license? Thank you for your help.