If you are upgrading to Support SDK then we highly recommend you to upgrade to our latest version
Please follow the below steps to migrate to Support SDK:
Remove the existing Helpshift unitypackage content from your project.
Make sure following directories are removed from your project before you import the Support SDK package
Assets/Helpshift/
Assets/Plugins/Android/helpshift-plugin-resources.aar
Assets/Plugins/Android/helpshift-plugin-wrapper
Assets/Plugins/Android/Helpshift.aar
Remove all the code related to Campaigns feature.