The use of '~' in the default value of the helios installation path prohibited activation of the plugin on windows 10 machines, this was changed to a more cross-platform friendly "os.getcwd()" (even if this points to a different location, but it needs to be set by the user anyway).
Thanks for pointing this out.
It worked fine on my Windows 10 machine - but os.getcwd() is more cross-platform friendly.
I will add some more code that avoids possible bugs with Windows directory paths.
The use of '~' in the default value of the helios installation path prohibited activation of the plugin on windows 10 machines, this was changed to a more cross-platform friendly "os.getcwd()" (even if this points to a different location, but it needs to be set by the user anyway).