Hello people KLK here, this is an update on my previous post "Make pc Games POrtable directX Tweak" which I linked in the comments. I have provided a working example of my files, see for yourself and edit the files to understand the example.
It is a Rar Archive , and you should unpack it to League Of Legends folder. Example : →C:\Riot Games\League of Legends ..run the KLK_MoD-no-dx.bat to start the game. The good thing is that you can run it either way
If you run the the KLK_MoD-no-dx.bat you run the portable version and if you Run the lol.launcher or lol.launcher.admin, then you run the game NOT-Portable