Change Log

Version 2.1.0 29 Apr 2026

• Lambda Manager with library of reusable LAMBDA functions
• LAS Import for well-log files
• Function Browser, Blueprint Manager, Eclipse Results Import, Case Generator, and Unit Converter redesigned as docked side panes
• Migrated to .NET 10 runtime

Version 2.0.0 15 Feb 2026

• 500+ Excel functions across 16 modules
• Blueprint Manager with ready-to-use worksheet templates
• Function Browser with search
• Clerk OAuth sign-in replacing legacy license code activation
• Standardized function naming and parameter ordering across all modules
• Migrated to .NET 8.0 runtime
• Requires Excel 2016 or later (dropped Excel 2010/2013 support)

Breaking Changes

• All functions are renamed and reorganized
• Some functions have parameters order changed
• Legacy license code activation removed (use Sign In instead)

Version 1.18.9450 15 Nov 2025

• Added 40 new DCA functions covering Exponential, Harmonic, Hyperbolic, Modified Hyperbolic, Power Law Exponential, Stretched Exponential, Duong, and Ansah-Knowles-Buba decline models
• New curve fitting functions with weighted and non-weighted options
• Statistical functions for SSE computation
• New online account licensing system
• UI improvements

Version 1.17.9320 08 Jul 2025

• Fixed licensing issue affecting Windows 11 users

Version 1.16.8957 10 Jul 2024

• Fixed issue where Excel could hang for several minutes on exit

Version 1.15.8584 03 Jul 2023

• Performance improvements for Eclipse file import

Version 1.14.8433 02 Feb 2023

• PVT function naming updates

Version 1.13.7753 24 Mar 2021

• Bug fixes and stability improvements

Version 1.12.7365 01 Mar 2020

• Fixed bugs in gas pipe pressure functions

Version 1.11.7106 16 Jun 2019

• Fixed bug in water viscosity correlation
• Hyperbolic decline functions now accept b > 1
• Added metric volume units

Version 1.10.6980 10 Feb 2019

• Added support for Microsoft Office 2019
• Bug fixes

Version 1.9.6580 06 Jan 2018

• Complete reorganization of PTA functions
• Added 14 new well test analysis functions
• UI cleanup: removed deprecated features

Version 1.8.6348 19 May 2017

• Added pressure transient analysis functions (7 new functions)
• Added utility function for data differentiation
• Added dimensionless parameter functions

Version 1.7.6198 20 Dec 2016

• Bug fixes and stability improvements

Version 1.6.5883 09 Feb 2016

• Added support for Microsoft Office 2016
• Fixed licensing for 64-bit Excel
• Fixed mathematical and interfacial tension functions

Version 1.5.5701 14 Aug 2015

• Added gas PVT functions
• Added water compressibility function
• New sample spreadsheets

Version 1.4.5660 01 Jul 2015

• New: Import Eclipse Results tool
• New: File Generator tool
• Added interfacial tension functions
• Added combined field profile function

Version 1.3.5629 31 May 2015

• Added 1000+ new unit conversions
• Added Beggs-Brill, Hagedorn-Brown, and Gray pressure gradient functions
• Added interpolation and mathematical functions
• Perpetual licensing option

Version 1.2 13 Aug 2014

• New licensing system with deactivation support
• Offline activation for closed networks
• All UI actions now undoable
• New "Insert Snippet" context menu

Version 1.1.0 09 Jun 2014

• Added 25+ well flow and productivity functions
• Steady-state, pseudo-steady-state, and transient flow
• Horizontal well productivity
• Gas well deliverability with non-Darcy flow
• Multiphase pressure gradient functions

Version 1.0.0 13 Oct 2013

• 100+ petroleum engineering functions (PVT, SCAL, IPR, Utilities)
• Unit Converter with 500+ conversions
• Sample spreadsheets