This is for anyone who wishes to uninstall the Windows Live Mail app faulty update which was supposed to make the app compatible with the new hotmail/outlook settings but crashed the app (in my case I could no longer use the calendar).

Info posted from here:
If you want to go ahead and try to install the patch or if you already did, you can revert/uninstall the patch by pressing -R (Windows Key and R) on the keyboard, then copy/paste the following:
msiexec /package {B775C26B-EAA8-4A11-ACBF-76E52DF6B805} /uninstall {342DCD5D-5946-453B-97AC-D53B7662EDF5}

Then press enter or click OK. When prompted, choose Repair.
You should then be back to version 16.4.3528.0331.