The formulas are not saved automatically with the data window. You could copy each of the formulas and paste them into the Posted Note of the data window. This information is saved as part of the data file. When you re-open the data file, you could copy the formulas from the data window Posted Note and paste them into the Formula Entry Posted Note and execute them as a multi-line formula.
KaleidaGraph is a thoughtfully designed graphing and data analysis application for research scientists, as well as for those in business and engineering fields. It produces publication-quality graphs, and easily converts the most complex data into a functional display.