Notes about the QL 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 QL file type is primarily associated with 'Progress' by Progress Software Corporation. The .QL file (along with the .QC file) is generated during the installation of Results. The .QL (and .QC) files may be deleted, and the Results software will recreate them when the program is next started.