I have Spectralayers Pro 9 installed and activated on my machine. Do I need to uninstall Spectralayers One to get it to come up when I invoke Extensions? Spectralayers One 10 comes up instead.
The rule is, the latest installed SpectraLayers takes control of the ARA extension.
You can simply install SpectraLayers Pro 9 again to have it take control of the ARA extension.