Segun Filext.com
Cita: Detailed information for file extension DIM:
Primary association: Active@ File Recovery
Company: LSoft Technologies Inc
Other applications associated with file type DIM:
* AutoCAD (Dimension File) by Autodesk, Inc.
* XMap (Symbol File) by DelormeXMap scalable mapping software that provides users with digital mapping tools. Often found in the DeLorme Docs\Symbols folder.
Aca te podes fijar:
http://filext.com/file-extension/dim, tambien podes fijarte las otras 2, si bien ya LordJhony te lo ha explicado,
filext te muestra otras posibles aplicaciones que puedan estar relacionadas a esa extension.