Yes, I do use mods, but I did remove them prior to attempting to do the fixes. This did nothing to help the issue. No, they do not load in new save files. I did another total strip of the game last night and uninstalled everything, rebooted my PC and reloaded Sims 4 then the world packs and still the worlds for those specific 4 packs never loaded (no mod content what so ever), however this time there was both no world and no content from those 4 packs even though the download manager showed 100% downloaded and the list of packs shows it as installed. The four are Lovestuck, Life and Death, Strangerville, and Realm of Magic. Also would like to note that I had purchased, downloaded and played Enchanted by Nature for a month straight and then it just disappeared entirely from my list of owned packs. I looked into it and then got a message saying I never purchased it, when in fact I had purchased and played it for a month. I found my receipt, but I see I was never charged for it on my credit card, so I did not pursue that one because I did not really care for this pack after playing if for a while.