In previous version of 4D, if you wanted to connect multiple clients to the same server on a single machine it was required to run multiple copies of the application file, each with their own ClientLocal folder.

Starting with 4D v17 R5, it’s now possible to run several copies (macOS and Windows) or instances (Windows) of the same application connected to the same server. To allow this, the naming of the cache folder has been changed. The naming in previous versions was based on Server-IP and Server-Port number, now with an additional instance number. The old cache folder and its data, will no longer be used. If you want to delete it, it needs to be removed manually.