Register DLL for vb.net

Upgraded to Windows 10 (not really by choice). INstalled Visual Studio and the latest version of a software package that I have used in the past so that it is compatable with W10. Now when I try to use a VB app that I wrote with the old version I have some broken references.

I deleted the broken references and re-added them by browsing. The DLL's seemed to add just fine. The app compiles with no errors. When I get to the line:

        Dim util As New LTJumpStart.LTUtility

I get the error:

{"Retrieving the COM class factory for component with CLSID {398C2A58-B0D7-48DF-8D6B-EF05CE20CE9E} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."}

I have tried to register the DLL using regsvr32 (both the 32 bit and 64 bit version. When I do I get:

Any ideas on how to solve?