Notes about the SED file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The SED file type is primarily associated with 'Sedertree Matrix Wheeling Systems' by Bayesoft Technologies. Scientific lottery number generator and positioning system in one (Pick-3 and Pick-4 lottery number matrix generator). This software has been released as freeware.