Dynamics 365 - Plugin Registration Tool Profiler Issues

Good morning.

I am working with Dynamics 365 July 2017 Update and Plugin Registration Tool from the SDK of April 2017 (the last one released).

I need to profile a custom workflow activity but I got issues: sometimes the list of the steps is empty and sometimes the tool crash.

Does anyone experienced similar issues? Have you founded any solution to make it working?

Many thanks for the support.

Daniele