My team has 2 applications using Telerik.UI.for.AspNet.Core, one is using v2020.3.1118 and the other is using v2021.1.119.  Each application up until now was worked on by 2 different developers, but now one developer has been assigned both applications.  

The developer was originally working with v2020.3.1118 and has that installed on his machine via control panel.  Now that he has been assigned the application with v2021.1.119, he can't build it until he installs the new version via control panel.  The problem is that he has to uninstall the older version when the new version is installed (control panel seems to force this). 

Is there something we are missing here, it seems odd to only allow one version to be installed at a time.  We cannot update the older version to the newer without triggering a full QA regression (both manual and automated) that takes several weeks to complete before it goes into our release pipeline. 

Thanks