[MBS] Preview fix for macOS

Hello, The preview functions have a little bug releasing memory, which can cause a crash on macOS. Sorry for that. It's already fixed for next version. If you like to try the Preview functions on macOS, you may better pick a newer build from our Dropbox: https://www.dropbox.com/scl/fo/p1qdqvtx4crciq122t1id/h?rlkey=g8cv3d50f8cegxbrgmb4779gv&dl=0 Otherwise, download 13.4pr1 in August. Best regards, Christian -- Read our blog about news on our plugins: http://www.mbsplugins.de/