Thanks Antoine for your workaround to fix the Labview crash after installation of the 126.96.36.199 version on also LV2018 SP1. Your tip just helped me, too. I had Labview crashing also with the previous 188.8.131.52 version installation on LV2015 SP1, there for some reasons it helped to install all required packages package by package with the JKI VIPM. Apart from that recent installation issue the Control class UI Tools addon is a fantastic tool, and we use it frequently. Thanks François!