Hey there Hypothermic,

I want you to try something;
- Head over to "C:\Program Files (x86)\"
- Find the Razer folder, do not open it.
- Right click on the folder > Properties > Security tab > Click on the "Edit" button to edit your permissions > Tick "Allow" on "Full Control" and apply that to every single user you see in the list.

Note that you have to apply the changes to every user, clicking on "Allow Full Control" then moving to the users clicking same thing and after that clicking on Apply won't change anything.
That's why you have to apply the changes every time you grant one of the users Full Control.
When you're sure that they are all granted with full access, run the Game Booster as Administrator and see if it works.