Solved: Conflict between Open Office and Office Starter

I have used Open Office for years with no problems. It's easy to save as a Word document. I bought a new new computer wrote several items, saved in OO. This computer doesn't have Word installed so I installed Office Start (not knowing the difference). Now every OO document on my desktop is taken over by Word - literally with a big W. I can't open it unless I agree to a long list of rules, including personalized ads, which I don't want.

I'm not very computer savvy and don't know if I should uninstall Office Starter.

Please advise.