[Tools like Healing Brush and Clone tool disappeared...]

I do not think you ever really answered the original question. I have the same problem. I just used the healing brush tool attached to the Band-aid (The British would call this a sticking plaster, I think) and when I was finished the band-aid/sticking plaster image disappeared.  I can not figure out how to make it reappear. 

While there is probably a simple answer to this, I suggest that really this is an interface flaw, in that it trips up the new user like myself. In the mean time I would like the official answer.

Help will be appreciated!

Cheers

Bob Locher