I just updated to 7.4.5 and noticed a Warning on the Cart page which applies to div class "csproducts"
I'm getting the following error message on all the cross sell products:
Warning: Undefined array key "wantmanufacturer" in /var/www/vhosts/badmanbullets (DOT) com/httpdocs/OnlineStore/vsadmin/inc/incfunctions.php on line 2820
My apologies for that but I've fixed this now so if you get a new copy of the updater and copy the inccrosssell.php script to your site it will sort this out.