IAR does not recognize production license

I started with SSP 1.5 under Eclipse. I switched to SSP 2.1 under IAR. I have a production license for both. To get the license to install, however, I have to select the 1.5 license, then select the 2.1 license.

This worked fine until today. Now I can't seem to find my 1.5 production license. Pointing IAR to my 2.1 license fails to load it. How do I fix this? isdebuild.exe is in the 2.1 utility folder, I have a valid production license for 2.1, so what else do I need to do?