Hi, a tip here on using TeamViewer:

Recently I've read several reports of TeamViewer mislabeling observers' (very) non-profit usage as "Commercial" and threatening to block their access. It started happening to me a few weeks ago, and this morning I discovered the cause: when I connect TeamViewer through a VPN, I almost always get the "commercial use" popup; when I connect without a VPN, TeamViewer works as normal.

This probably arises from VPNs' roots in corporations' providing wide but secure access to their employees, and TeamViewer haven't figured out (or don't care) that VPNs have since gone very mainstream. In any case, the workaround is simple enough, and I don't especially care if someone snoops on my downloaded FITS files. Hope this helps.