Are you using Remere's map editor?
If so, open your map, click on the menu Map -> Properties... and then where it says "Client Version", choose the one you wish and click OK.
NOTE: Remember that if you're downgrading your map for example from 8.4 to 8.22, some items (the ones that are only for 8.4 version) will NOT be seen on the editor but a red square will appear there on the place of the stated items, and you will still see them in-game (if you're using client 8.4 to play), just not in the map editor until you upgrade it again to 8.4.
Cheers~