Uninstalling the Mac App
Make sure the Crashlytics Mac app is not running before attempting to uninstalling it. You can close the Mac app by using the gear icon in the lower right hand corner, then selecting "Quit".
Once verified that the Mac app is no longer running, navigate to your "Applications" folder on your Dock!
To uninstall the plugin, simply drag Crashlytics onto your Trash.
And... you're done!
Uninstalling the Android IDE Plugins
Android Studio / IntelliJ
Next, select "Plugins" from the sidebar, and then choose "Crashlytics Plugin for Android Studio / IntelliJ". You should see an option to "Uninstall Plugin".
Select Yes to complete the process!
First, you need to get to the Eclipse installation details. On a Mac, navigate to the Menu Bar and select "About Eclipse", or on Windows, this will be under "Help".
On the following screen, choose "Installation Details" on the about eclipse page.
Now select Crashlytics from the list of installed software, and press "Uninstall".
Complete the process by pressing "Finish"!