Tekxit 2 (Official) 1.7.10 updated to version 2.25r
v2.25r (R Stands For Rawr Update)
There will be another update later. This is just for the sake of updating the IP.
Type in the modpack name (Tekxit 2 (Official) 1.7.10) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Tekxit 2 (Official) 1.7.10 from the list on the left. The launcher will handle everything else!