Archicad 19 crashes when changing construction mode of Arc/Circle tool

[luciant]

We are experiencing the following on all MacPro machines with Archicad 19 (Build 7006) and High Sierra 10.13.4:
When using the Arc/Circle tool, switching between construction modes causes an immediate crash. This is consistently reproducible.

This happens in Teamwork files and stand alone pln's.

This did not happen when we were on Yosemite.

I've sent the bug report to Graphisoft but have not contacted my reseller yet.

Has anyone else experienced this?

Thanks!