Can't install after changing from US to Canadian version

I had a paid up-to-date membership to the US Mac Q Deluxe. When I tried to update I got a "have to renew" dialogue. Support suggested changing to CDN version, since I'm in Canada. They cancelled the US one and started a Canadian one. Now when I try to open Q I get hung on "verifying membership status" I have uninstalled and downloaded a new one from the CDN page. Still hung at membership stage. Could this be because I am running High Sierra? Not supported but should be able to still use it. No? And what does that have to do with membership status. Thanks.