After a crash a message asks to contact Steinberg technical support with the crash report file but I can’t find the address
You can post the crash dump file here and I can look at it for you. (I am not a Steinberg representative.)
I would also recommend changing the title to something a little more descriptive.
Your MySteinberg should have a link to either Steinberg Support or a list of Yamaha/Steinberg distributors. You should contact your local distributor if the direct link to Steinberg Support isn’t available.
You should mainly send them crash dumps in cases of recurrent crashes. Please include what you were doing at the moment of the crash, if you remember.