Command-Line switches don't work

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Tried switch --stamp
'"C:\Program Files (x86)\GmailBackup\gmail-backup.exe" backup "D:/Backups/Mail" 
"myname@gmail.com" "mypassword" --stamp'
2.Tried date switch 20110618
'"C:\Program Files (x86)\GmailBackup\gmail-backup.exe" backup D:/Backups/Mail 
myname@gmail.com mypassword 20110618'
3.

What is the expected output? What do you see instead?
downloads every email, (actually skips downloaded emails. File called "stamp" 
is NOT created in Backup folder. Backup folder is not protect (i.e. not 
ProjectData). I am administrator.

What version of the product are you using? On what operating system?
revision 15 (2011-03-07)
Windows 7 64 bit

Please provide any additional information below.
Tried putting path, email, pw in "quotes", removed quotes, I don't know what 
else to try.

Original issue reported on code.google.com by AntMcP...@gmail.com on 20 Jun 2011 at 7:25

[GoogleCodeExporter]

win7 64-bit works fine for me with both --stamp and date switches.  however, if 
the "labels" backup fails, per your earlier issue, the --stamp is not created.  

Original comment by ekork...@gmail.com on 20 Jun 2011 at 7:12