OK, read well!
This is how to fix "outdated" issue :)
Open your League of Legends folder to this EXACT path:
path=C:/Riot Games/League of Legends/RADS/projects/lol_air_client/releases/0.0.1.13 (NOTE!! Could be higher number depending on when you read this.)
Now remember those numbers 0.0.1.13
Open the LOL Skins folder, open the "config" file.
Find that same set of numbers near the top. If it is not the same set of number Make It So!
And Done, welcome ;)
EDIT: Invalid path fix... When you select League of Legends file location (after install) Make sure you select just the League of Legends folder, not character, not images, not any other folders just the League of Legends folder inside the Riot Folder.
Hope this helps, if not sorry to be redundant.