IDM8 upgrade issue - Could not find process

Hi Experts,

I am trying to upgrade a IDM 7.2 system to IDM8. I am able to connect Eclipse to the IDM 8 design time now. But I find the repository's event processes were lost after the upgrade. When I try to add them back, I could not find any process available even though they are there.

In the developer trace, I found this error message right after I click the button. I think this is the cause. How should I deal with this error?

Exception: Can not encrypted value for   decrypt failed: javax.crypto.IllegalBlockSizeException: Invalid use

Thanks,

Chenyang