I made a simple part in Sheet Metal and added a Simulation Express test and it asks me for a material type even though it has a material type defined. 

I want to delete all Simulation Express data and start over. 

The start over within Simulation Express leaves the problem as it is.

I can't find where this data is. 

So far I have done the following: 

I have done several tests with Simulation Express including changing parameters of the part. 

I have saved and exited the software and also restarted the computer. 

Simulation Express still cannot be run on this part. 

Please help. Thank you.