Did you install another version after 2014?
No, I did not. I'm running the 2014 Release version of InDesign for Windows (see screenshot below). And as far as I'm aware, Adobe has not released another update to the 2014 release version. I used to have the older version of InDesign Creative Cloud installed as well (the version right before the 2014 release), but have since uninstalled it as didn't want or need two versions of InDesign. I may just try re-installing the 2014 release version and see if that fixes things.
Uninstalling earlier versions on Windows AFTER installing the new version is going to kill you associations in many cases.
Reinstalling the new one is the easiest fix.
This worked like a charm. Windows is now allowing me to change the file association to InDesign CC 2014.
Hi Bob - I had a similar issue after installing CC 2014 from the previous version of CC. The InDesign file association was lost.
After an uninstall/reinstall of InDesign 2014, in theory I managed to get my associations back in Windows 7 (64) - however in practice whilst the indd files show the association and the correct icon now, if trying to load a file from Windows it will open InDesign (or bring it to the front if already open) but not actually load up the file I've double-clicked once it's there. I can only open the file by dragging it into InDesign or through File > Open.
Any ideas? Is this an InDesign bug or something in Windows/the file association I still need to sort?