A new version of the PCA toolbox (for MATLAB) is now available for download. This is a collection of MATLAB modules for calculating unsupervised multivariate models for data structure analysis: Principal Component Analysis (PCA), Multidimensional Scaling (MDS) and Cluster Analysis. In this new release, the graphical interface has been improved. Now forms with plots can be resized, classes can be loaded both as numerical or string arrays, visualisation of class potential in the score plots was added. Have fun!