I had a Pro Module AddIn that was working fine in Pro 2.4 and VS2017. I upgraded to VS2019, Pro 2.5, .NET 4.8, re-installed the Pro SDK, and everything broke. All my references were broken. I followed the advice here: At Pro 2.5 The .NET Framework is Changed to 4.8 I ran the utility "Pro Fix References". It ran, reloaded the project, but didn't fix anything. So I had to created a new AddIn from scratch and ported everything over to the new solution and project, which takes a little know-how. I had similar experiences with upgrading ArcMap AddIns in the past with various attempts at using utilities and painful experiences. I'm also not clear on how the Pro SDK upgrades work. It's my understanding that the Pro SDK release cycles are aligned with Pro release cycles. However, when I upgraded to Pro 2.5 while still in VS2017, there were no updates listed for the Pro SDK extension in VS2017 (I believe I installed the SDK before 2.5 was released). I uninstalled and re-installed the Pro SDK just in case. Should there be an update or should we uninstall and re-install the Pro SDK when we upgrade Pro versions?