Can't adjust Touchpad settings

I can't seem to change the Touchpad settings on my Dell Latitude 5480 running Windows 10 1809. When I click the Dell Touchpad settings link below it triggers a prompt to find an app to open "alpstouchpadsettings"

Any ideas? I've tried installing the latest driver from Dell below but it makes no difference:

https://www.dell.com/support/home/us/en/19/drivers/driversdetails?driverId=228PM&osCode=WT64A&productCode=latitude-14-5480-laptop

Touchpad control panel settings
Prompt that appears when clicking link