If I go through my Network then I have the choice of choosing what I want to open them with. See images below. In the first image I right clicked on the document and then I can choose to open them with Word Desktop. This way should change them to where they all would open with this. If this doesn’t work then look at Choose Default Program.
If you do not see what you want under Recommended Programs or it does not open them then click on the arrow out next to Other Programs. If nothing looks right there that may work to open them then click on, look for the appropriate program on the Web.
None of the above will help if you are using the My Cloud App. The best thing I have found there is to make sure older Works or Word documents I have is to open them in Word and then make sure I save them in the correct format. See example image below. Army Reserve letter and Book of Luke saved in two different formats. Old Works documents from my old XP computer will not open with MS Word through the My Cloud App.
I hope this will help.