Microsoft Office 365 Home costs about $50/year on sale this time of year, with basically 6 licenses, each with 1 TB of OneDrive storage. Using that, Word can auto-save docs you're working on to your OneDrive account almost immediately as you type. That makes the odds of having a corrupted Word file slim. However stuff happens, making DataNumen Word Repair something it wouldn't hurt to have in your tool kit, but personally I feel that adding it to the right-click context is a step too far, considering how unlikely it is that I'd ever use it. *To me* the ideal solution would be to have an in-app toggle to turn the context menu on/off, but absent that, I found that if you copy the installed program's folder to another copy of Windows, it will run, adding necessary registry entries, but Not those for the context menu. SO after monitoring installation in a VM, that's what I did.
The app install itself is far from terrible, using one registry key for the app itself, though several are used for the context menu. The app adds files just to the program's folder, making it about 9.5 MB.