I've been playing Pixel Dungeon on my Kindle Fire hd lately, and I decided to check if there were any updates for the game since my version was still in 0.4.2, and I saw that the latest version was 0.4.5. So I uninstalled the app, reinstalled it, but it didn't update. After that I used the dropbox link in the thread for news and information on the game, but it says something about an already existing signature and fails to install. Help?
Forgot to mention that it specifically said that an already existing application package (.apk) with the same name and conflicting signature was preventing the installation, even though I uninstalled the 0.4.2 version from the device and cloud before trying to get 0.4.5.
When it tells you that you have no new updates can't you go on the page of pixel dungeo in the market and update it from there? Also if you're going to root your device look specifically for yor device model. They might have some guides over at xda developers.