Here's the 2nd method. This is what worked for me.
Only works if you have apk signature disabled with luckypatcher.
1. Uninstall DoZ.
2. Install from play store.
3. Restore progress with google play.
4. Overwrite with mod apk.
5. Profit.
For people getting stuck on load screen.
1. Overwrite install with original apk.
2. Update through play store.
3. Open the update.
4. Overwrite install mod apk.
profit.