GLOBAL FIRE GEKKO-1L addressable 1-loop fire center.
As a general rule, we recommend using software with the same version as the FW version when using an up-and-down downloader.
It is best to update the previous FW version centers to the latest FW version and then you can use the latest version of the software.
For example, if the firmware version of the panel is VR010402 (you can check this in menus 8-9 for more details), then the connector should also be version 1.4.2.