Most Android applications are updated from the Google Play Store. This inherently means that you can conveniently update, but cannot go back to the previous version of the app if you encounter issues with the updated version.
If you want to revert to the older version, you need to backup the older version of the app you have on your device before updating it from the play store.
To backup the apps installed on your android device, download Saveapk from the Google Play Store from https://play.google.com/store/apps/details?id=org.mariotaku.saveapk.
You can now start SaveApk on the Android device and save the app you want before you update it from the Google Play Store. If something does go wrong after that, you can remove the app you downloaded from the Google Play Store and re-install the saved app from your device.