Hello,
Upgrade won't brake any configuration, after upgrade all your configurations will be OK.
To upgrade you need access to repository
https://github.com/GluuFederation/cluster-mgr
1. go to branch **4.5**
2. click **Code**
3. click **Download**
As shown in attached image.
After download you can upgrade as `pip3 install ./cluster-mgr-4.5.zip --upgrade`
Regards.