Unassociate File Types in Windows 7

Purpose: 在 Win7 取消特定附檔名被預設程式開啟

Tool filename: Unassoc (v1.4)
Download from here: https://www.dropbox.com/s/z2pxitiru4md5uf/unassoc_1_4.zip

• This is a green software, do not need to to the installation.
• Just run "Unassoc.exe", and that operation UI shows up.

• Select the file type from the list
• Click " Delete file type ".
• The user-specific association for the chosen file type is now removed from the registry. The system will now use the global file association settings.