Incorrectly detecting content location as inside installation folder

[Jacob Helwig]

With Open Rails installed to "D:\Open Rails", and the Zig Zag Route content installed to "D:\Open Rails Train Simulator - ZZ", attempting to add the Zig Zag Route content to the installation profile gives an error with "Cannot use content from any folder which lies inside the Open Rails folder D:\Open Rails". The content is not within the Open Rails folder, but it does begin with the same string representation as the Open Rails folder.

[James Hatch (silenthatch)]

This affects me as well, my two file paths are:

D:\Open Rails
D:\Open Rails Routes