If I could give it 0, or -5 I would. I paid for this app, only to have it constantly crash and for me to lose all of the work, highlighting and annotations I made. Now, its been trying, and failing, to download an update for over a week now, and it wont even open. Worst app I ever downloaded, let alone paid money for. Complete GARBAGE.
hRCstudent100 about Markup Ultimate, v6.2