The Analyse button becomes enabled after the data have been correctly loaded.
The analysis depends on the type of data loaded: hourly data or frequencies (more analysis is produced for hourly data than for frequencies). It also depends on some user choices (erosion potential calculation, wind energy, ...).
WindRose PRO produces an output file with the same name of the file loaded and extension .ANL (e.g. if the input file is sample.csv, the output file is sample.csv.anl) containing information about the data loaded. This file can be viewed using the Output button.