[All] BF: Added a more accurate message when the user opened an old data file.
[All] BF: Volatility calculation now returns a weighted average based on the open interest of each option instead of depending on the number of options in the chain. This increases the accuracy of the calculation drastically.
[All] AF: Expired options in a selected strategy now reflect the sunken profits or losses that originated just before expiration. Previous versions just ignored expired options.
[All] BF: Fixed crash when user would cancel printing from the final box.
[All] BF: The window menu is checked correctly when the user opens a new document and when the program is started.
