Yup, I’m with you. You pay for something, you expect it to work properly. The funny thing is that the issue has been there for a couple of months I think. When I tried to update the Assistant manager about a month and a half ago, the app wouldn’t start at all. I thought that there was something wrong with Windows new update (1903) or my security settings. But all along it was the download location.
I don’t have Dropbox but I could send you the update file via WeTranfer in your email address later on tonight. Alternatively, look for some free VPN apps like Proton VPN or similar and download it from a different server.