Notes about the WST 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 WST file type is primarily associated with 'GridImp' by Winwaed Software Technology LLC. GridImp is designed to plot contour-like datasets that are indexed by coordinates, rather than by place names for use in Microsoft MapPoint. This file is an XML-based format used by GridImp to store custom color palettes for use in MapPoint. The file format was intended to hold other MapPoint-related information, but this has yet to be realized.