Since you are rooted, you can use a rooted file manager like ES File Explorer or Xplore.
Make sure you have superuser permissions set in settings of the file manager app.
Download this file:
This is Provision.apk.
Go to system/app and cut and paste the Provision.apk out of the system to a folder on your sd card.
Copy and paste this version of Provision.apk to system/app and give the app read/write/execute permissions.
Reboot and see if you have the soft buttons back...and the home button works.
Let me know if this works...and I will update the ROM with the change for everybody.
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