Ulterior is Kodi Build from Lockdown Wizard. This Build uses the Ulterrior Skin and it has size of 377 MB. This will work on any streaming device that has Kodi installed including Amazon firestick, Amazon fire TV, Android TV box, Nvidia shield TV, and Windows PC.
It has also sections for Movie, TV shows, Live TV, Music, Images, Favorites and with fully loaded working add-ons.
How to Install Ulterior Kodi Build Leia 18
Step 1) From home screen go to the Gear icon (top-left corner) or Settings
Step 2) Click File Manager
Step 3) Click Add Source
Step 4) Click None
Step 5) Enter the following URL: http://repo.lockdown.in/
Step 6) Name it lockdown
Step 7) Make sure all the boxes are filled and press OK
Step 8) Go back to Home screen and click add-ons
Step 9) Click the Box icon from the top left
Step 10) Click Install from zip file
Step 11) Click lockdown
Step 12) Click repository.lockdown-2.1.zip
Step 13) Wait for the notification in the top-right corner to popup, Lockdown Repository Installed
Step 14) Click Install from Repository
Step 15) Click lockdown Repository
Step 16) Click Program Add-ons
Step 17) Click lockdown
Step 18) Click Install
Step 19) Wait for the notification in the top-right corner to popup, Lockdown WizardInstalled
Step 20) Click Continue
Step 21) Click Build Menu
Step 22) Click Ulterior
Step 23) Click Fresh Install or Standard Install (Fresh Install is usually bests)
Step 24) Click Continue
Step 25) It will download and install
Step 26) Click Force close
Step 27) After it installs restart Kodi and it should come up. Be sure to give it time to build menus and update add-ons.
How to change the Skin back to Default Estuary
If this Build does not work for you here is how to change the Skin back to default Estuary and remove it.
Step 1) From home screen go to the Gear icon (top-left corner) or system
Step 2) Click Interface Settings
Step 3) Click Skin
Step 4) Click Estuary
Step 5) Click Yes
Read Here for How To Remove a Build From Kodi Using the Fresh Start Plugin.