I am new to Infragistics, and just inherited a .NET C#/VB solution where I was asked to upgrade (Windows Forms) from 19.2 to 21.2.  Previously, we've deployed our product with ~10 Infragistics DLLs, but no explicit license file.  Also, we are not using Nuget packages, so the DLLs are part of our solution, and the various projects have references as need directly pointing to the DLLs.  Here is what I've done and where I am stuck:

1. I installed Infragistics_WinForms_20212_WithSamples (Infragistics_DevTools_20212.exe)
   At the time, several days ago, I had not yet gotten the new Product key, so I installed Trial version
2. In my VS2019 solution, I removed the 19.2 references, and added all new 21.2 references, pointing to the DLLs from the installation (C:\Program Files (x86)\Infragistics\2021.2\Windows Forms\CLR4.0\Bin)
   1. I built the solution clean, and gave a copy to a colleague who does NOT have Infragistics installed.  
   2. He was able to use the program, and even saw on the control that he was using "UNLICENSED TRIAL" - as expected.
3. I now got the actual 21.2 Product Key from our IT.  Here is where I am getting into a mess, and have tried various things...
4. I re-ran the installer and when prompted gave it the product key - which it accepted... The install then took several minutes, so my guess was that it replaced the DLLs with non-trial versions.
5. I again went through removing references, adding in new DLLs as references, clean build, etc.
6. However, my colleague using new copy of program still sees the UNLICENCES TRIAL warning.
7. I've also some other things, but nothing has helped yet.

I am guessing there is something basic that I am doing incorrectly, so any help/advice on this would be greatly appreciated.  (Also, any explanation of where exactly the license info is stored, if it is not actually embedded in the DLLs.

Thanks in advance!

Larry