4.010
fixed: 7z working with filenames starting with an "@" fails if the filename also contains a space
fixed: header support: possible infinite loop when file is too short
fixed: header support: wrong hash calculation (in file and memfile) when file is too short
fixed: detection of prefered archive type falsely failed for unpacked sets causing creation of zips
misc: unneeded check also detects obsolete chd folders
misc: explicity test folder for no entries to avoid possible deletion of NTFS junctions
misc: check if file really exist in 7z/rar archives before trying to remove them. Gives a small speed gain
