FNIRSI via USB on the computer, Menu/USB Connection, to backup the content, check the Folder Options/View/Show hidden files, folders and drives option and >>>> Uncheck the Hide protected operating system files option/Apply/OK and the hidden folders of the FNIRSI Memory Card will be visible. In the contents, except for the System Volume Information folder, back up all the remaining folders by opening a folder on your computer and using the copy and paste option. Even a 1GB memory card is enough for FNIRSI, if you have a spare memory card, install according to the instructions with the Installer and when FNIRSI opens, you can set the Menu/System Setting/Other Setting/Boot Menu and Default Start, New autostup other buttons ON/OFF according to your preference. After the installation is finished, you can use it with both software, the old software remains in it, there is nothing to hesitate, if you want, I can help you with Remote Connection with AnyDesk.
The necessary installer for Windows and the latest FNIRSI Firmware are in the RAR folder. Delete the .txt extension and the necessary file will be visible in the RAR. You can extract the folder from the RAR and start the process.