The Quick Way to Open Files with DEMO Extension

Different software packages use different file extensions, so if you can't open the DEMO file, it could be because:

  • You don't have the associated software on your computer (Unknown Apple II File and Demo are the most popular software packages that use DEMO file).

  • You may have Unknown Apple II File or Demo but your computer is not configured to associate DEMO files with the relevant software.

  • The file is corrupt.


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If You Don't Have Unknown Apple II File or Demo

In order to open your DEMO file, you will have to download Unknown Apple II File, Demo, or another similar software package.

If Your Computer is Not Configured to Open DEMO Files

If you have the relevant software, but your computer still won't open the software, you will have to change the file associations on Windows or Mac. Depending on your operating system, you can ensure that your computer always open DEMO files using Unknown Apple II File, Demo, or another program of your choice that uses DEMO files.

If that still doesn't work, you can get in touch with your software developer to find out what you can do. You can contact any of these developers for more information or assistance:

Software Developer
Unknown Apple II File found on Golden Orchard Apple II CD Rom
Demo PC Software Company

If the DEMO File is Corrupt

X

In some instances, you may receive an error message stating that the file is corrupt. If you have tried all of the above, and it still doesn't work, download or request a new copy to see if that works.


Open DEMO File the Easy Way

If you don't want to download Unknown Apple II File or Demo (for whatever reason), and the other options also don't work... that's okay!

Even though some DEMO files must be opened in a program for which it was developed (binary format), you may still be able to open it in a universal file viewer such as File Magic. Download File Magic now from the Microsoft Store and open your DEMO file!

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Download Universal File Viewer (File Magic) 

Optional Offer for File Magic by Solvusoft | EULA | Privacy Policy | Terms | Uninstall