First, 50alpha35.6 requires VCRT 2017, but I can find no offline package available for it:
This means 35.6 cannot be installed on a system that does not have internet access, so systems that are on private LAN for reasons of security and stability cannot be used for testing it. So a humble request to the devvvvs to please not make vvvv dependent on internet access.
Also, (and this appears to be an MS problem), when I went to install b35.5 on a system that a35.6 (and hence VCRT 2017) had been installed on, the VCRT 2015 install would fail saying a version of 2015 had already been installed; I had to uninstall 2017 before it would install 2015. So things are not really stable with 2017 yet, another good reason to not build in a dependency to it, if possible. Thanks!