How to disassociate app to specified account in android

I have been using two account for Google Market say Acc1 and Acc2. I installed Instagram using Acc1 but now i want to associate it using Acc2. I uninstalled Instagram, switched to Acc2 and tried installing Instagram again. But the app still shows Acc1 at “Accept & download” page. How can i solve this?
thanks
Answer #1
In the play store app, did you click on the menu button and choose your account 2?
Answer #2
After uninstalling the app, remove the app from Acc1 library. Play store -> Acc1 -> My apps -> All
Logon to playstore on your PC using the Acc2, and install the app onto your device from there. Now the app will be showed under Acc2.
Answer #3
After uninstalling the app, remove the app from Acc1 library. Play store -> Acc1 -> My apps -> All
Logon to playstore on your PC using the Acc2, and install the app onto your device from there. Now the app will be showed under Acc2.
Thanks….this worked!!! btw is there any way to do the same but for apps that cant be uninstalled, like for eg Google+?