Since I have installed macOS High Sierra,

I cannot open Family Tree Builder,

but receive this message:

Initialization Failure

CrossOver is unable to initialize a critical component.

Failed to import cxutils module into Python.  See console for errors.

The program will now exit.

I am also having the same issue since upgrading to High Sierra.

Sent an email to Support -ie  support@myheritage.com as you suggested.

Have received a Ticket Number as confirmation receipt.

Thanks Remo