If I want to write something to a local text file, In past versions I had been able to select "append to file" and enter a new file name. I tried this on a C4 and a C7 with 18.104.22.168. The problem is I cannot enter a new name for the file, I can only select from existing filenames. So the work around is to select "write to file", then when the file is created I can go back and select "append to file"
Seems as though this should be fixed.