Hello,

I have created a manged package and is on AppExchange. Now I want to make chnages to the earlier version and also adding new features(I wanted to modify/delete custom fields,custom objects,vf pages and apex classes too) I cant figure out how to it. I have gone through ISV guide and also https://help.salesforce.com/HTViewHelpDoc?id=publish_upgrades.htm&language=en_US.
It might be a stupid question but where can I modify it. I created a new dev org and installed my managed package there but I cant make any of those changes but in the document it says developer can make those chnages.

Do i need to login to the old dev org on which I made the package to modify? I am stuck, it must be a very basic thing that I am not able to understand

Thanks.