I managed to update my "Astro on the go" using Aptoide store.

Here how I did it.

i. Download and install Aptoide from http://m.aptoide.com/installer

ii. From the Aptoide Store, search Astro on the go (6.1.0)

iii. You will be prompted with "You don't have 'astro on the go' in your added stores." with "Search more" button next to it.

iv. Click the "Search more" button.

v. Select "Astro On-The-Go INT (6.1.0).

vi. Select "Install" button

vii. Another screen loaded (in the background) with "Do you wish to install:", select Yes.


Alternatively, after you have successfully installed the Aptoide store, launch the Aptoide and select "Updates" tab to update your old version of Astro on the go to the latest version. Please try this method to see whether it work or not.