Scaler 2 wont work in FL Studio: Error "There was a problem opening the plugin

MAC OS El Captain 10.11.6

I keep getting a error that says
“There was a problem opening the plugin Scaler2 for an unknown reason. Please make sure it was installed correctly.”

It was working before when I first purchased a few days ago.
The only versions that appear are VSTi, VST3 and AU and all of them do not work,
On the install it says it installs VST2 but I do not see that version downloaded.