Hi,
You can do more as many builds for the same app as you want, as long as you don’t change the name and id info, if you do simply delete the old one. But the free account can only have a single private app. So you have two choices.
1. Make your app public, a lot of people don’t like to do this.
2. Delete the app from PhoneGap Build service. I dd this for quite a while. I would use the PhoneGap Build service to build the app, download the platforms, then I would delete the PhoneGap build service reference to it. As long as you don’t delete it in MyEclipse you can easily go back anytime and rebuild it as ME keeps everything it needs to resend.
#2 works well for a few apps, but if you do a lot of building and testing I would suggest a subscribed account to allow the 25 private apps.
Thanks,