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DoubleKiller Pro » FAQ

  DoubleKiller Pro is a very fast and flexible application for finding and removing duplicate or similar files.
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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 "ignore".
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 activated.

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:

  1. Right-click the extracted help file, and then click Properties.
  2. 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 Microsoft.
If this does not solve the problem, please ask the support for help.


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