jExperience 1.11.7 allows you to use jCustomer 1.4.4 or jCustomer 1.5.4+ (we recommend the latest version of jCustomer: 1.5.7). It is expected to be the last version compatible with jCustomer 1.5.7 and below while future versions will require the upcoming jCustomer 1.6.0.
As a reminder, jCustomer 1.5.4+ works with Elasticsearch 7.4.2. This allows you to use Elasticsearch 7 on Jahia 7.3. Using jCustomer 1.5.4+ will also ease your migration from Jahia 7 to Jahia 8: you will be able to use the same jCustomer version and you don't have to migrate your jCustomer instance.
jExperience 1.11.7 is a minor relese with some bugfixes and improvements. The changelog is available on store.jahia.com.