Getting the same issue. The game seems to start but some kind of error aborts the launch. When I checked the log I found this:
[0000.75] Critical: appError called: Failed to find file for package Core for async preloading.
[0000.75] Critical: Windows GetLastError: The system cannot find the file specified. (2)
[0007.51] Log: === Critical error: ===
Failed to find file for package Core for async preloading.
Address = 0x74de43d2 (filename not found) [in C:\WINDOWS\System32\KERNELBASE.dll]
Address = 0x10c91b1 (filename not found) [in C:\Games\Renegade X\Binaries\Win32\UDK.exe]
Address = 0x10de52f (filename not found) [in C:\Games\Renegade X\Binaries\Win32\UDK.exe]
Address = 0x247e515 (filename not found) [in C:\Games\Renegade X\Binaries\Win32\UDK.exe]
Address = 0x247de1d (filename not found) [in C:\Games\Renegade X\Binaries\Win32\UDK.exe]
I suggest anyone getting the same issue to check their log in 'Renegade X\UDKGame\Logs'.