What you need?
Introduction
Step 1: Add MKV files to the program
Step 2: Profile and destination folder
Step 3: Conversion from MKV to AVI
Software: 4Videosoft MKV Video Converter
OS Supported: Windows NT4/2000/2003/XP and Windows Vista, Windows 7
Hardware Requirements: 800MHz Intel or AMD CPU, or above; 512MB RAM or more
MKV to AVI Converter software is an excellent MKV to AVI conversion tool for users which can perfectly and quickly convert MKV to AVI video format. With MKV to AVI Converter, we can easily accomplish the conversion from MKV to AVI. It is really your best choice to make it.
Why need to convert MKV to AVI?
Now MKV has become popular in the cartoon and anime fan-subbing community since it supports multiple audio and subtitle tracks in the same container, but AVI is more widely accepted by digital player like iPod, MP4 player and more. If you want to transfer MKV file to your digital player, then you need to convert MKV to AVI.
Let us familar with this powerful MKV to AVI conversion software quickly. Screenshot:

Step 1: Add MKV files to the program
You can click "File -> Add File..." to add the MKV file. Alternatively, click the "Add File" button to import the MKV file.
Step 2: Profile and destination folderIn the profile option, choose one format that you want to convert to, and under the Destination option, choose a folder to save your output files.

Go the settings option to customize your output settings, such as video Bitrate, Resolution, Frame Rate, Encoder etc. You also can use the default settings. This is decided by your choice.

If you are an advanced user and want to do more with your MKV files, please go to this window by clicking Effect: 
Step 3: Conversion from MKV to AVI
At the time you only need to click Start button on the right bottom corner to complete conversion task from MKV to AVI.
