An author by the name of Patricia Burroughs is reporting onthat the latest version of the Kindle app for Windows 8, v2.0.0, no longer supports ebooks with PRC or Mobi file suffixes. She is citing a couple user reports that make this claim, and if they are true then Amazon has decided to make their app much less useful.
Unfortunately, I'm not so sure that is true but TBH I have no first hand info either way.
Update: Just to clarify, I am asking a question about the Win8 Kindle app, not any other Kindle app. The Kindle app which runs on Windows 7 is not the same app. They are different apps entirely.
The thing is, I have found several reports that indicate that the Kindle app for Windows 8 never supported personal documents, meaning that Amazon has not taken away any abilities. For example, the blog Neowin reported on the updated when it was released a few weeks ago, and several commenters made remarks along the lines of:
ouch still no sideloading of mobi files
I also found threads on the official Kindle support forums that imply that the app doesn't have this feature (here, here) as well as a review of the app from January which says basically the same thing.
I have not been able to confirm this myself (no Windows 8 thank FSM) , so I am going to leave this question open to anyone who would care to answer it based on first hand knowledge of using this app.
Can someone with Windows 8 clear this up, please?