In case you have more than one Google account on your device (and only one of them has a subscription), you can manage your subscriptions via the Manage Subscriptions button in the app’s Settings.
1. Open OfficeSuite.
2. Tap the main drawer.
3. Touch ’....’ to sign in to your account.
4. Go to Settings.
5. tap Manage subscriptions.
6. Tap ‘.... ‘to switch to your other account.
7. Go back to OfficeSuite and tap on Manage subscriptions again.