F1 2015 just came out few days ago and seems like they have changed their encryption since previous versions. it was possible to use the CTF EGO editor, but now they no longer use .ctf files. I guess it has something to do with the trainers I made.
Luigi Auriemma wrote a QuickBMS script to decrypt the .erp files so you can read them.
You can grab the script here:http://aluigi.altervista.org/papers/bms ... 15_erp.bms
and you can grab the required QuickBMS here:http://aluigi.altervista.org/quickbms.htm
double click on QuickBMS.exe
Select the script
select input file
select output folder
It works on every .erp file, which is pretty much the entire game.
This can also be used to make handling editor for F1 2015, i needed it to be able to write some trainers, so that i don't have to spend ages to search things, now it's easy, so trainers are inbound :)
Special thanks to Luigi for fast response and script.