No you will NOT lose your license when doing this.
I think if you update to the latest release you will be ok as the PCIe cards should work and the SFP as well.
If you wish to update to DSSv7 up75 you need to have a valid support contract purchased. Without it, the latest you can update is DSSv7 up71.
Also, please keep in mind that starting November 2024 DSSv7 reached it End-Of-Live (EOL) state.