title: How to refresh environment variables after outside editing without re-running the process
body: <p>The environment variables are cached when a process starts.<br/>
  Assume I start CommandPrompt with the current set of environment variables (and their values).<br/>
  Then I change OUTSIDE (by System properties window) some values of these environment variables or even add some new.</p>
  
  <p>When I type now <code>echo %var1%</code> then the old value of environment variable is visible.</p>
  
  <p>How can I "refresh" the environment variables inside this CommandPrompt from the current (updated) state without re-running the process?</p>