Mouse problem from 2.0 to 3.0

Hello everyone,

I have a problem with an experiment created in E-Prime 2.0.

I now have E-Prime 3.0 and when I opened it, the file was converted.

The problem is that the mouse no longer works without me making any changes. I can see the cursor and move it, but I can not click on anything (and move on to the next "slide").

Can you help me to fix the problem?

Thank you