When I try to upgrade from 17.2 to 18.1, I get an error.  I am using Windows 10/Visual Studio 2017.  Here is the log:

3:59:32: Running VS2012/VS2013 Add-in UI Version 18.1.20181.17
03:59:32: Gathering volume and assembly information.
03:59:32: Could not locate registry entry Software\Microsoft\Microsoft SDKs\Silverlight\v5.0\AssemblyFoldersEx where we look for installed products.
03:59:32: Could not locate registry entry Software\Microsoft\.NETCore\v4.5\AssemblyFoldersEx where we look for installed products.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:32: The path {0} didn't contain any Infragistics assemblies.
03:59:33: Analyzing Senco.CustomControl.csproj...
03:59:33: The project has references that need to be updated.
03:59:53: Updating Senco.CustomControl.csproj...
03:59:53: No matching assembly located in available assemblies Infragistics4.Win.UltraWinCalcManager.v17.2.FormulaBuilder
03:59:53:    at Infragistics.VersionUtilitySupport.Core.Product.AssemblyXmlFile.ThrowExceptionWhenAssemblyCouldNotBeFound(String assemblyName, Boolean checkAdditionalMessage)
   at Infragistics.VersionUtilitySupport.Core.Product.AssemblyXmlFile.LocateNewAssembliesNodeforCurrentAssembly(String assemblyName)
   at Infragistics.VersionUtilitySupport.Core.File.Types.ProjectFile.Upgrade(String rootDirectory)