Plot of power against effect size for proportion studies enhanced to negative effects
Power for next stage and Overall power in analysis tools uncorrectly specified in step K-1: Corrected
Improved text output in analysis tools
Minor changes

Continuity correction also possible for power at given sample size in one-sided case.
Power for next stage and Overall power in analysis tools uncorrectly specified in step K-1:
Corrected in Version 2.1.10
Plot of power against effect size for proportion studies enhanced to negative effects
Improved text output in analysis tools
Minor changes

Sided information not taken into account for general design pln file
Corrected in Version 2.1.9

Crash if significance level text box empty and click on alpha spending:
Corrected in Version 2.1.8
Minor changes

Minor changes

Speed and accuracy of optimization routine (optimum Delta) improved

Warning messages included for t1 < 0.05 and alpha_0 < 0.50
Tabulator indices changed for Analysis of means
Copy to Clipboard style in Basisform uncorrectly in graphical style
Corrected in Version 2.1.5

Algorithm improved for independence case

To improve precision, internal value of lower bound in the one-sided case with no stopping for futility was changed.
Two-sided case for K = 2 stages can produce inaccurate results.
Corrected. Problems fixed with Version 2.1.3.

Design specification worksheet incorrect in a special case.
Distributions output is active by first time of use (should be always inactive).
Corrected. Problems fixed with Version 1.2.4.