Section Tool

Clicking on selection in the 2018 version on my machine causes the entire program to freeze up which only a computer restart cam restore functionality. This behavior only pertains to section itself the panes, cuts and fill tool do cause the program to freeze.

Thanks

Two questions:
Have you installed SU by right clicking on the installation file and choosing run as Adminstrator?
Do you have SU linked to the R7 in the Radeon graphics settings?