Version 1.0 - October 2012 
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- First official version

Version 1.2 - December 2012 
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- New resource types (productive inputs, emissions)
- Block volumetric water tariff (in addition to fixed volumetric tariff)
- Optional flat rate in water tariffs
- Emission costs
- Bug fixes

Version 1.3 - April 2013
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- Multiple investment costs per stage
- Exporting result tables
- Bug fixes

Version 1.4 - September 2013
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- Multiple categories per resource
- Model Definition Report

- Bug fixes