Many Build Items Removed (game ver. 1.105.345.1020)
@nativecoruscant That's odd that Sims 4 wouldn't be on Revo's list. I've seen other reports of it, but typically when the EA App says the game isn't installed either, for example when an antivirus has quarantined the executable and therefore neither the App nor Revo can find it.
At any rate, the alternative approach is to manually delete the folder(s) in question, or let Steam uninstall the game; and then remove all Sims 4-related entries from your computer's registry with Piriform's CCleaner (the free version is fine). That should give you the same fresh start that Revo would.
It sounds like the missing items might not have an entirely different cause though. Do you have any idea which items are disappearing, at least some of them? Perhaps you might be able to get an idea from the Gallery screenshots. EA-made items (not cc) shouldn't disappear as long as you still have the associated packs installed, and 400 items is a lot to have vanish no matter how much cc you'd previously installed.
It is of course possible that at least some of the disappearing items are from cc that you've always used but had to update at some point. For example, all cc beds broke in one patch, and while a batch fix would have preserved your existing cc collection, I'm not certain the game would recognize the items as the same as the originals in your old builds.
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