MineTek 4 updated to version 2.8.5
Updated Extra Cells to version 1.7.10-2.2.23-b43.
Updated Open Blocks to version 1.7.10-1.3-snapshot-523.
Updated Open Mods Lib to version 1.7.10-0.6-snapshot-279.
Type in the modpack name (MineTek 4) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select MineTek 4 from the list on the left. The launcher will handle everything else!