Hi Tammy ,
Refer to the following links to find your serial number .
https://helpx.adobe.com/x-productkb/global/find-serial-number.html
https://helpx.adobe.com/x-productkb/policy-pricing/volume-licensing-site.html
You can uninstall Acrobat using the Cleaner Tool for Acrobat.
Let us know if this helps.
Regards
Sukrit Dhingra