The update to RailModeller Pro 5.3.4 has been released on the Mac App Store with improvements to editing flex tracks:
Connected tracks can now be modified within certain limits to ensure the connection angle to their neighboring track doesn't change. Connections to other tracks are now established automatically if possible when shaping flex tracks.
The update includes new and updated track libraries as well as a number of bug fixes.
RailModeller Pro 5.3.4 requires macOS (OS X) 10.9 or newer and is available exclusively on the Mac App Store.
Installed apps will be updated automatically by the built-in Software Update feature of macOS.