Notes about the QPF 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 QPF file type is primarily associated with 'Quartus II' by Altera Corporation. Quartus II design software is a comprehensive environment available for system-on-a-programmable-chip (SOPC) design. Quartus II replaces the MAX+PLUS II Software for chip design. These files were also used by MAX+PLUS.