U-RENDER Beta 7 (2018.12.02-beta) is available for download now.
This is a bug-fix release.
-  - Improvement when switching the communication port
-  - occasionally flickering frames when rendering multi pass targets
Cinema 4D Plug-in
-  - fixed crash when Cinema 4D was started with optional command line parameters
-  - fixed synchronization issues when merging Cinema 4D scenes that use U-RENDER