Image Manager in Admin Not working (Journal 2 theme)

I was using Journal 2 to change a photo in a slider. It evokes the standard Admin Image Manager.

I uploaded a photo, but image never updated. Image manager closed and then wouldn't open.

I tried:
resetting cache
restarting safari
turning of javascript, turning back on
restarting machine
looking in console

Before I found the issue. (I posted this topic as I could not find an answer anywhere after an hour of searching)

I used an ftp client to find the file I had just uploaded, which was quite large. I deleted it and BINGO!

PS the photo could be anywhere not in the folder you were in at the time.