The File Extensions Database


.D41 File Extension

  • Developer by: Håkan Sundell
  • Category: Emulator Files

What is an .D41 file?

.D41 is CCS64 data

The d41 file extension is related to the CCS64, a Microsoft Windows emulator of popular C64 an 8-bit computer developed by Commodore company in 80's.

The d41 file stores some kind of data used by CCS64.


How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.

How to solve problems with D41 files

  • Associate the D41 file extension with the correct application. On :
    Windows: Right click on any D41 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.D41 files". Mac: Right click (or Ctrl-click) the D41 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .D41 is CCS64 data. Because only the current version supports the latest D41 file format. Search, therefore, e.g. on the Håkan Sundell manufacturer website after an available .D41 is CCS64 data update.
  • To make sure that your D41 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.