BlackWidow Ultimate 2014 + Naga Trinity. Which Synapse?

Hello. When setting up a new Windows 10 install, Synapse 3 (S3 in advance) popped up UAC asking to install. I said yes. Then found that the keyboard wasn't being detected, so after a bit of investigation, found that it's supposedly still not supported. So I installed Synapse 2 (S2 in advance). Then opened S2 and found that the mouse wasn't there. "Perhaps it's being kidnapped by S3, so I'll uninstall it". So I uninstalled S3. After a reboot (I always reboot after an install or uninstall, no matter if software asks me to do it or not), the S2 was still showing only the keyboard but not the mouse, so I digged a bit more and ended here: https://support.razer.com/gaming-mice-and-mats/razer-naga-trinity/ It mostly talks about S3, but: How do I adjust the DPI setting? Out-of-the-box, you can make basic changes to the DPI of your Razer Naga Trinity on-the-fly via the DPI buttons located behind the scroll wheel. Once you have installed Razer Razer Synapse 2.0 or the upcoming Razer Synapse 3, you will have access to more DPI options. So the page explicitly mentions S2, then it's supposed to work. It wasn't the case, even given that's a brand new PC from yesterday night with a clean Windows 10 disc installation. No matter which troubleshooting or "uninstall-then-install-driver" via devmgmt.msc I've done, it still doesn't show at S2. Furthermore, if we go to S3's page: https://www.razer.com/synapse-3 we find a "BETA" tag next to the header, so I suppose that we can't be forced to beta test a product we've paid for (and not a cheap one), so it's mandatory that it needs to be S2 compatible. So please either help me make Trinity mouse appear at S2. Or explain me what's going on with S3 and if I've paid for a full product but gotten a beta one. Thanks in advance.