UPDATE (patched)
Now this one’s a little more crazy. It involves you forcing the old explorer to show up again via the Roblox Studio Internal builds so it doesn’t use the non plugin explorer version. You can patch Studio to become internal here (make sure studio is closed): GitHub - 7ap/internal-studio-patcher: 🩹 Patches Roblox Studio to grant internal permission.
If you see Roblox Internal it’s good to go. Next go to FILE at the top left, Advanced, and Open Flag Editor. Search for “NewExplorer” and set it to false. EDIT: Also set “KillOldExplorer3” to false. EDIT 2: You also have to set “LuaExplorerPackages” to false as well, otherwise some things might not work as expected when applying properties. Thanks @Renanivx for finding this. Apply and restart studio. It should show the old explorer now as long as the internal feature is enabled. If it doesn’t you can disable internal until someone else finds a better solution. Just warning you that bugs can occur because this is unstable.
None of this works anymore due to a recent removal of the flags reverting this update back.