EsenRurouni

Just purchased a key, but I can't inject the license key to the Loader_Spacex.exe for Apex. All I'm doing is copy pasting (I also tried manually putting it in). The insert button does work. And when I try to remove it, extra letters and numbers start appearing even if i highlight and erase all. What am I doing wrong here? Just to add: reading the Guides page, the Insert button is Greyed out after putting in the key, and I have tried restarting a few times. A screenshot below of what happens when I copy paste the key from a notepad - There always appears to be a "G" at the bottom of the line.