I agree with vocx. Of course every addon has its history, but since is is now a well-working addon API, why should BoltsFC stay special?
If BoltsFC is not meant to be a workbench but a collection macros, then I think it should be listed in the Macro section of the addon manager. Then its central macro can be installed like every other macro and BoltsFC will work as designed, right?
In general I think all addons should work on all OSes and the symlink setting is obviously not working on all OSes. If BoltsFC should nevertheless stay as it is then it would be helpful to have a note like this in the addon manager:
"Note: BoltsFC can only be installed on Windows if you have administrator privileges.
Also note that it is not designed to be a standard workbench but to form a collection of macros that can be used from all workbenches."