Issue
Adobe Acrobat Professional DC application will not launch when the MacroView Plugin is installed, and protected mode is enabled in Adobe.
Resolution
1.) Open file explorer and navigate to C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\plug_ins\MacroView and rename the file MacroViewAcrobatDCPlugin to MacroViewAcrobatDCPlugin.old
2.) Open Adobe Pro, go to Edit --> Preferences --> Security (Enhanced) untick Enable Protected Mode at startup
3.) Open file explorer and navigate to C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\plug_ins\MacroView and rename the file MacroViewAcrobatDCPlugin.old back to MacroViewAcrobatDCPlugin
Please note that in MacroView DMF 9+ this has been resolved and protected mode in Adobe does not need to be disabled.