Re: Getting error "Cannot open the file "*****.INDD". Adobe InDesign may not support the file format, a plug-in that supports the file format may be missing, or the file may be open in another application."

When I have seen this message it is either when I try to open a document with an older version of Indesign E.g. an indesign 2014 document with Indesign CC.

The other time I have seen it is to open an Indesign CC document with Indesign 2014 which does not have Mindsuite - a plugin I use. Mindsuite, as yet, has not upgrade the plugin for Indesign 2014 therefore it recognises that a the document was created withe a plugin that the 2014 version does not have installed.

I believe your problem will be something like that.