looks like a very detailed program with some advanced features. UPDATE does not work. It takes me to the official website and wants me to install an .exe to update. Can someone fix this as this program is advanced for free and I would like to see it make it to the official portable apps platform. THANKS!
As JStock is still in beta testing you would have more success posting a comment to its own thread (most developers are subscribed to their own releases, so receive emails notifying them of user comments).
If the developer is still active and is still supporting JStock they may update it for you.