Sorry to say I picked up malware after a screen sharing session with Camtasia help. The malware put a microphone icon on the desktop that recorded all that was said. I couldn't access the internet. I called Mac help; I needed another computer to download malwarebytes, didn't have one. I took my Macbook pro into the genius bar, thank goodness I had a recent backup. Furthermore, the hacker was able to leave the following in the annotation I was writing "Nice seven minute F... was it." I could not get through to Techsmith help, I left a call back number, but so far I have heard nothing. So BEWARE of screen sharing sessions. The main problem I was having was many files were missing when I opened a particular file. Going back in Time Machine didn't work, it seemed to take the problem back in time, all previous files in my project were infected too. In the future, I'll stop saving to the Cloud until I finish my project. I'll see if that helps.