V4 beta Feb-27-2019 available now

 From:  amur (STEFAN)
9266.51 
Hi Michael,

when using v4 beta under Windows 10 and exporting as .obj i always have to expand the dialog box and tick
the merge vertices box. In v3 on the Mac it remembered the state and keeped the dialog box expanded and
the checkbox ticked, when restarting MoI.

Best regards
stefan