Just Upgraded my Win 7 Ultimate 64 to Win 10 Pro.
Had 1st some troubles with graphic / audio drivers and also updates did not install and suddenly the Start-Menu did not open ... well .. 3 reboots later everything worked (even graphic/audio drivers got installed by windows .. or where activated, no idea .. i did nothing just reboot 3 times so no idea what the problem was. But however .. i hate the metro UI .. i got the feeling i'm using a fu.. android tablet..
Back to topic .. until now everything is working for me .. i only had to reactivate Temlatetoaster and some "other" Template creator .. even Photoshop and Office are still working.
So whatever i tested with TT until now .. it seems to be fully Windows 10 compatible... and working.