Sourcetree shouldn't floor my CPU, & especially not when it's not being used

When I use SourceTree, I often notice degraded OS performance. When I check the Task Manager, I see numerous listings for "Git for Windows (32 bit)" running, followed shortly by a host of "Git Credential Manager for Windows".

Though I appreciate that SourceTree wants to see if there are updates to my repos, I wouldn't expect it to allow this many connections at once. Further, I only have six tabs (currently) open, indicating that I'm not really all that worried about updates to more than those six repos.