the following service article from mcafee could be of help;
McAfee KB - How to download and install McAfee consumer products (TS100342)
if you choose the first option; download or install to pc or mac
first time install to pc or mac
you have Windows 11,10 ect pc
you see as first option Mcafee Software Helper Tool
if you enter your Dell registered details the tool should take care to do the uninstall and new install from your Dell acount automaticly.
or you could try contacting live support;
on the right side of this page there is in the middle someting like contact/talk to expert.
follow the next steps to get assistance
hope this helps solve the problem