Notes about the NM 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 NM file type is primarily associated with 'RM Number Magic' by RM plc. RM Number Magic is a package covering information handling, modelling and monitoring, which helps primary schools to meet the curriculum requirements for ICT.