If upgrading the extension for ENS doesn't resolve it, then I would advise to open a ticket with McAfee. You don't have to upgrade the clients, as the extensions are backward compatible and will still manage lower versions of clients.
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JUst wanted to pipe in and add this tidbit of info...
On wildcards when you add a '/' at the end of the exclusion that will enable subfolders to be checked. The reason for that is without that tyour only going to the current directory so say you wanted to exclude all sub directories in say C:/Program Files (x86)/McAfee to add the subdirectories using wildcards you could do C:/Program Files (x86)/McAfee/ and select all sub folders. Look at Kb54812.
Exclude a specific file in a folder named Temp anywhere on the system.
Exclude a specific file anywhere on the system.
Exclude a specific file in any folder on a specific drive.
Users\**\Documents\Microsoft User Data\
Exclude any folder under Users and any folder under User Data (select also exclude subfolders).
C:\Documents and Settings\**\Favorites\
Exclude the Favorites folder for all users.
Exclude any folder named Favorites on drive C.
Exclude the Temp folder in any location, on any drive.
In this example the following directories would be excluded:
c:\documents and settings\Administrator\Local Settings\temp
Exclude any file with a .tmp extension in a folder named Temp anywhere on the system.
Exclude any file with a .html extension anywhere on the system.
Exclude all files named inifileX, where X is any valid character for a file name, in any folder name beginning with Temp under C:\Windows.
Exclude all files with the .tmp extension (*.tmp) in any folder on a specific drive.
In this example, any *.tmp files on the 😧 drive are excluded: