Btw, fyi, ibm and wcg are the only boinc project using https connectivity, partner security requirement such as corporations volunteering their computing resources, the rest uses http. There's the agent re-install clean change of course, but you could also firewall block the berkeley ip, assuming you've got a firewall, or configure the agent to not check for new versions or at ibm instead of berkeley. The configuration manual at https://boinc.berkeley.edu/wiki/Cc_config.xml gives various options how to nail security further down such as <suppress_net_info> and a slew of proxy configs so, as per the warning in your tor message, to use socks 5 for instance. Up to you.

Oh, it seems the tor network is being used for hard to track attacks on websites and companies as well. Interesting that tor in this can then be deemed as a facilitator, to include your tor running computer. Think about that.