Notes about the OTM 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 OTM file type is primarily associated with 'Micro Cookbook' by IMSI/Design LLC. This program does not appear to be supported any longer. It was developed for Microsoft Windows 3.x.