You can downgrade your app easily by apk file from only 2 simple commands in windows, But there are some prerequisites to it.

• Have a computer.
• Adb should be installed in the system. Enable
• developer option, usb debugging and install via USB option in
  setting. just go through the internet you will understand how can you set these developer option.

Then make sure adb connection is there to the device and run following commands. Example of windows system:

adb push C://path_to_the_app//app.apk /sdcard/app.apk

adb shell pm install -r -d /sdcard/app.apk

This downgrades your application to whatever the apk version you have having all the previous data of your app.

Note: setting up adb and developer option is easier so you can just find it out in internet

You can downgrade your app easily by apk file from only 2 simple commands in windows. But there are some prerequisites to it.

• Have a computer.
• Adb should be installed in the system.
• Enable developer option, usb debugging and install via USB option in
  setting. just go through the internet you will understand how can you set these developer option.

Then make sure adb connection is there to the device, and run following commands. Example of windows system:

adb push C://path_to_the_app//app.apk /sdcard/app.apk

adb shell pm install -r -d /sdcard/app.apk

This downgrades your application to whatever the apk version you have, keeping all the previous data of your app.

Note: Setting up adb and developer option is easier so you can just find it out in internet.