Running OpenOffice and Microsoft Office at the Same Time: Issue

[Juliana]

Hi Team,

I have been using Open Office. Yesterday, I installed Microsoft Office 365 
Personal. Now I have the following issue:

I cannot open xlxs files. I have to use Open Office and cannot open with 
Microsoft Office. This is true of Words documents too.

Does Open Office take precedence over Microsoft Office?

I need to import xlxs files into JotForm and cannot do so at present.

Could you please help?

Thanks so much,
Juliana