For minor errors like "Google Play has stopped," try clearing the Google Play Store data in Settings before resorting to a full firmware flash.
If you can still access recovery, turn off the phone and hold Power + Volume Up until the Android logo appears. Use the menu to select "wipe data/factory reset" .
To successfully update or restore your device, you need the specific version matching your hardware: Explay Rio Explay Rio Play Processor: MediaTek MT6572. Operating System: Android 4.4 KitKat (Stock). Common Tools Needed: SP Flash Tool (for MediaTek devices).
(to allow your PC to communicate with the phone in "Preloader" mode).
If the device is "bricked" (stuck on the logo or won't turn on), you can try these methods:
A green circle or "Download OK" message will appear once finished. Disconnect and boot the phone. Troubleshooting & Recovery