If you are experiencing slow load / startup times for the 64-bit version of VDM, running the following command may significantly improve / speed up performance. 

Fixing Slow Launch 64-bit Build

Launch the command prompt as an administrator and run the following command/script:

C:\windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe install "C:\Program Files\BridgeWorks LLC\BridgeWorks VDM\VDM64.exe"

Please note that you may need to update the path to VDM64.exe to reflect your installation.