Breverb 2 is the full version, whereas Breverb Cakewalk is the included version. If you have Breverb 2 in older projects, you must have installed it at some stage using its own installer. It does not include a ProChannel version but is more fully featured. The two are not interchangable, so you would need to ether replace each instance of Breverb 2 wth Breverb Cakewalk or reinstall Breverb 2 using the install files you used before. It will not overwrite Breverb Cakewalk, which you can still use as a prochannel module if you wish.