TMS 5.1.3 upgrade on pre-installed Qnap possible?

[JAB]

Hi,

I see a new version of TMS is available (TMS 5.1.3).
My Qnap has TMS 5.1.2 pre-installed by firmware.

Can I upgrade this version to TMS 5.13 using the download on this site?
If so, which OS version must I use? And will it keep my pre-installed license?