kodi will not start and run any more

Hi I am new to kodi and I watched some you tube videos and down loaded kodi 17 krypton and had it working then I did something stupid you watched another video and tried to put a pre-build no and it crashed it. I try to delete kodi from my computer many times and now it will say it downloaded but when I click kodi to launch it nothing happens can anyone help me.i am using it on a windows pc any advice would be helpful thanks mike.