Certificate Expired - Impact Ssecurity in 1.8.0 in QNAP

So I realized today that I was running the 1.4.1 version in my QNAP (the version they still have in their “app store” as latest" so I downloaded the 1.8.0 and when installing it I am getting the warning about “Digital Signature Warning, The certificates for this application have expired, installing this application may impact NAS security”. It let me install it anyways and now in the QNAP apps Duplicacy has a special icon saying the same, so I wonder what’s going on because of course it concerns me.