Visual Build 7.7 compatible with Windows Server 2012 R2?

[CodeScrubber]

With Visual Build Pro 7.7a running on Windows Server 2012 R2, When I open a .bld script it is always in read-only mode.

Mouse hover does not work
Right click does not work
cannot expand or collapse steps tree
Macros and Actions are grayed out.

I did suspect a permissions issue, but I can edit the file with NotePad++. I can also edit a project script and save the file with VisualBuild.