@Henrik: I installed Tobii Eyex last night. All worked smoothly, except that I had issues with exactly the %HOMEPATH%\AppData\Local\Frontier Developments\Elite Dangerous\Options\Bindings thing.
The Infinite Screen Extension app installs only as admin. However, in my case Elite:Dangerous was installed under a standard user. The Infinite Screen Extension app complained about not finding the ‘Bindings’ folder, which it expected under the admin account. I had to recreate the E:D folder structure under my admin account to solve this issue
TL;DR: please respect user accounts when installing the ISE app. Don’t force it to install as admin.