How Do I Update Unity Ads Version?

Hi,

I have a new game on Google Play and I have noticed through Unity Analytics that it crashes for about 5% of users and then when I investigate it further, the log files usually mention Unity Ads.

I am running Unity 2018.3.7 but I noticed that the Unity Ads package is version 2.0.8 and yet Unity Monetization on the Asset Store is at version 3.0.1.

How can I update to the latest version of Unity Ads? All the documentation I come across for Unity Ads tell me to install Unity Monetization from the Asset Store, but I don't think that works because version 2.0.8 still remains even after I import the Unity Monetization package.

My other option is to not use Unity Ads at all because I am using Appodeal as my main ad server and I use Unity Ads solely as a backup when there are no ads available through Appodeal. In fact could it be that using both are causing the crashes because they both get initialised together at startup.

Any help would be greatly appreciated.
Peter.