Mercalli V6 SAL
First check whether the corresponding NVIDIA encoder (h264 or h265) has been selected in the Mercalli V6 SAL export settings. If there is no entry with the name suffix NVIDIA, then this could be due to the installed graphics drivers. At least the NVIDIA driver with CUDA 11.1 (from April 2022) or newer is required.
A Mercalli V6 SAL code can ONLY be used for activation on one PC. Activation can be deactivated at any time in About (i) of the program. This means that the code can be used again for activation on another PC, but never on 2 systems at the same time.