Install older Kodi (v18.9 or 19.4) while still using main v21



Hello, I have Kodi installed on my Android TV Philips 4K and since v21 (or maybe v20), I feel video playback is not smooth as before, so I wanted to check if older versions would run better…

I got v18.9 and v19.4 apk, can I install one of them without messing with my main v21 installation ? Especially with database folder ? (I fear both kodi version would share same folder…it would be really messy I guess, add-ons etc…)

Is there any recommandations to get before trying all of this ? 

I did recent backup of everything with backup extension already !

If I go on with older version, will it auto-update like v21 from playstore ? 

Thanks !