When I'm backing up my files using toucan in 7zip mode, the window become not responding, I waited for a while and the computer hang..
After that I use portableapps backup feature in 7zip mode also, no problem encountered and the backup was faster..
the application hanging should be fixed in the latest beta which should also have speeded it up.
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Author of Toucan
'...and do the other things, not because they are easy, but because they are hard...' JFK