I installed a launcher (syndicateapps ICS 4.0) on my rooted Kindle Fire; like an idiot I ticked 'Set to Default' only to get "The application ICS 4.0 Launcher (process android.process.acore) has stopped unexpectedly".
Force close just loops round to the same screen.
I can access my KF with adb but haven't able to find the file I need to edit which will remove the default.
Advice appreciated.
I had the same issue... here is a solution using a windows machine.
Refer to this link and the back links in the video description to setup the Kindle Fire Utility. Once installed -- if not already, open kindle Fire Utility folder, you should see a file called 'run' inside. Double click on that file, you should see a command prompt window display.
Type in '7' for going into the 'Extras' options.
From there type in '2' which "Installs Google Apps / Go Launcher.
Once all the packages are installed you will gain access to your home screen to remove the launcher you have and use your fire again.