This is the response from dymo stamp. I did as they said and am now printing stamps again.
We have seen this cause problems with the .NET framework Microsoft uses and Dymo
Follow these steps to correct
Step 1: Download Microsoft Windows Installer CleanUp
Save the file on the Desktop.
3. Please double click the msicuu2.exe file to
install it on the computer.
Step 2: Remove .NET Framework
Click Start -> (All) Programs->Windows Installer Clean Up.
locate and remove Any .NET Framework 2.0 software.
After that, please
perform the following suggestions to reinstall .NET
Framework 2.0 and its
Step 3: Reinstall .NET Framework Version 2.0 SP 1
download and install the following
Microsoft .NET Framework 2.0 Service
Pack 1 (x86http://download.microsoft.com/download/0/8/c/08c19fa4-4c4f-4ffb-9d6c-150906578c9e/NetFx20SP1_x86.exe
When the "File Download" window appears, please click Save, and follow
directions to save the file on the Desktop. After downloading all the
files, please double-click on each one to install them.