Official releases are published in my github repository:
https://github.com/stargo/android_packages_apps_Safestrap/releases

This is just a mirror of the released 3.75, as this URL is
already well known.

================================================================================

These are builds of Safestrap now fully supporting SELinux.
They are signed with a different key than the one from Hashcode
or the previous debug build, so in order to install them you
need to do the following:

 * Boot to stock
 * Start the old Safestrap-version
 * Uninstall Recovery
 * Uninstall the Safestrap APP (due to the different key)
 * Install the new Safestrap-version (signed with a new key)
 * Install recovery again

If you enter recovery, the device will now also execute a new
kernel, so you will get the kexec-vibrate at this point, too.

This new Safestrap is fully compatible with old ROMs, you don't need
to downgrade if you want to install any old ROM.

Source:
https://github.com/stargo/android_bootable_recovery
https://github.com/stargo/android_packages_apps_Safestrap