I have read your post.
Please be informed that all McAfee upgrades/updates will be pushed automatically. You need not have to uninstall and reinstall the software.
But, when the automatic upgrades/update process is interrupted due to some error or slow internet connection or an human intervention then the automatic updates gets corrupted. Only in that case we go for a Manual upgrade of the corrupted files that involves in the uninstall and reinstall process.
Please revert for any clarifications.