How to get a clean install? (newbie)

Hi Guys.

Totally new to Kodi, so sorry if i missed something.

Did try som kodi with a lot of things installed, but didn’t like it so wanted to go back and start from scratch.
do did uninstall kodi and tried with the new 17, but that won’t start. Installation is going well but it will crash upon start.

So did download a 16.1 version.. work better.. but still if feels like all old “crap” is still there.. any way to get a new fresh and clean install??
Did try some ideas i find on youtube where you add a ( reference to crappy banned addons (wiki) site removed ).. but it won’t get me the same files to install that shows on the tutorials..

Any ideas??
Thanks