Notes about the QPH 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 QPH file type is primarily associated with 'Quicken' by Intuit Inc.. The Quicken Price History (QPH) file contains a record of all of the prices that have been entered or downloaded for all of your securities. Usually named QDATA.QPH.