Kodi on my TV

I have a new 55 inch Spectrum TV and Kodi has been working fantastic. Today I turned it on and was seeing the same picture on each side on the TV. Like I was seeing double. Can someone help me fix this? I tried it in my bed rooms 36″ and it works ok there. Now it doesn’t work there anymore. Probably from me messing around with it. Can some one help me with this issue? I wanted to reset but don’t want to loose all the settings because it was done for me by a friend of my daughters…. THANKS Confused
Jagstarrr~