DoubleKiller Pro » FAQ
||DoubleKiller Pro is a very fast
and flexible application for finding and removing duplicate
or similar files.
Frequently Asked Questions
I have moved some duplicate files to a backup directory.
How do I restore them?
Restoring the files is quite easy as the complete directory structure is preserved
when you move files to a backup folder. So when you move 'D:\foo\bar\something.dat'
to the backup folder 'E:\Backup\', it is moved to 'E:\Backup\D\foo\bar\something.dat'.
All you have to do to restore the files to their original location is opening
the backup folder in Windows Explorer and copy or move the contents of each
partition's folder to the corresponding partition - e.g. move the contents of
'E:\Backup\C\' to 'C:\'. Windows will tell you that some folders already exist
and ask if files may be overwritten - answer yes (as you have moved the files,
no files will be overwritten anyway).
I have accidentally deleted the wrong files.
How can I restore them?
If you have just deleted the files, it might be possible to restore them with
an undelete tool. When you delete files, their content is not erased, but the
disk space is marked as "free" and can be overwritten by newly created
files. So you should not create or modify any files on the partition (drive
letter) you deleted the files from. If possible, use another computer to download
e.g. PC Inspector
File Recovery or Restoration,
copy it to a floppy or CD and then execute it on the affected computer (without
copying it to its hard disk!). You may be able to recover your files if no modifications
to the hard disk have been made in the meantime.
What is a catalog file and what is it good for?
A catalog file basically consists of a list of files and some information about
them, similar to what you can see in the result list. This information can be
accessed by DoubleKiller any time later, just as if it had access to the catalogized
files themselves - you can add the catalog files to DoubleKiller's directory
lists like real directories.
Catalog files can serve a lot of different purposes. One of the most obvious
is to catalogize your CD-ROMs or DVD-Rs so you can quickly compare any files
on your hard disk against the files on all of your archived CD-ROMs without
having to insert them. When disabling all comparison criteria you can even use
DoubleKiller to search for a particular file (by name, file size etc.) in your
catalog files and let it tell you which CD it resides on. You can also use catalog
files to take snapshots of certain directories and compare them against a later
or earlier version.
How do I create a catalog file?
Catalog files are created from a result list. While this may seem odd, the
great advantage is that you can use any of the filtering capabilities DoubleKiller
Pro offers for scanning and checking duplicate files.
So the first step is adding the folders you want to catalogize to the directory
lists and set up the file name, attribute and size filters. To catalogize all
files in the directories, disable all file masks and set the other filters to
Secondly, you will mostly not want to catalogize duplicate files only, so head
to the "Comparison Options" page and uncheck all comparison criteria.
Click "Run" to start the scan. DoubleKiller will produce a list of
all files found in the given directories, passing the given filters.
When the scan is finished, right-click the result list and choose "Create
catalog file..." to bring up a dialog which allows you to specify which
result entries (all, selected or checked) and which data (e.g. CRC32 fingerprints)
to include in the catalog file and where to save it.
Please see the help file for more information
and an extensive usage example.
I have purchased DoubleKiller Pro, now how do I activate
the demo version?
The code you received per mail is not to be entered into the demo version,
it is a login code for the customer's area where you can download the full version,
get prioritized support and subcribe to update notifications.
Please log in at the customer's area using your email
address and the code you received, go to the download section and download the
full version (and optionally the help file). This version does not need to be
When I open the help file, I can see the table of contents,
but the right window says "Page cannot be displayed". What should I do?
This is caused by certain security features of Windows XP SP2 when you download
the file via Internet Explorer. Unfortunately the help file content is just
blocked instead of telling the user what has happened.
To view the help file, you need to tell Windows that you trust the supplier
of the file. Just perform the following steps:
- Right-click the extracted help file, and then click Properties.
- In the General tab, click Unblock.
I cannot open the help file at all. What should I do?
If you have an older version of Windows, you may have to install an update
of Microsoft HTML Help. This can be obtained for free from
If this does not solve the problem, please ask the
support for help.
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If you have any further questions, please contact us!