Preventing application extensions changes.

How can I prevent LO from overwriting application extension defaults every time it updates? I am running MacOSX 10.10.5 and have a full MS Office suite and I’ve recently added LO. However, it appears that every time LO updates (LO Vanilla from the App Store) , I have to go through the process of updating all of the application defaults back to the MS Office products.

If I can’t prevent this unwanted overriding of the launching defaults, I’m simply going to delete LO. I am required to use MS Excel for certain projects and I’m tired of having to go through the reassociation drill.

RFO