Adobe Acrobat Pro not running

I have upgraded my Adobe subscription from Acrobat to Acrobat pro, specifically to enable me to use the measurement tool. However, when I go into the app on my MacBook, it only offers me the use of the base level Acrobat. I have signed out, then back in again, done updates on my laptop, restarted my laptop, checked that my Mac is running the Acrobat app rather than the’Adobe Reader’, and nothing has worked. 
Any advice would be much appreciated.

thanks 😊