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Many specialized geophysics courses provide complimentary temporary licenses for RES2DINV. 2. Open-Source Alternatives
: In 2023, the developer (Seequent/Aarhus GeoSoftware) initiated a program to replace physical USB dongles with a new licensing system.
: Students and educators can often request temporary full licenses for coursework. Open-Source & Free Software :
For legitimate use, the software can be downloaded and installed through authorized geophysical resource providers: