If SOFTWARE LOCK is active on the AUDIO 8 DJ, you have either activated the corresponding function in the Audio 8 DJ Settings or TRAKTOR PRO 2 is running and controlling this particular setting.
In TRAKTOR PRO 2, you can only change the Input Mode of your AUDIO 8 DJ from within TRAKTOR's Preferences. This function allows you to switch between Timecode Vinyl, Timecode CD / Line and Phono modes directly from the TRAKTOR user interface.
To change the Input Mode, go to Audio Setup in TRAKTOR's Preferences and make your selection under Phono / Line > Input Channel.