Make a backup of profile_00 before editing, just in case.
For Steam edition users :
The location (on my machine) to the profile file is
C:\Windows\Program Files (x86)\Steam\userdata\123456789\1234567\remote
The numbers will be different on other computers, so I typed 1234 etc.
The name of the profile file is profile_00
Editing with a hex editor (I used winhex) didnt’t work. I changed 3840 to 1000 as the X position of the window but it still corrupts the file and a new one is created.
I will make a bug report if it isn’t there yet.