Why do I have two copies of TechTool Pro?

If you have TechTool Pro and Protogo installed on your Mac, you may find that there are two copies of TechTool Pro on your Mac.  You may safely leave both copies on your Mac.  They will not conflict with each other.  

You will want to make sure that you update both copies as updates to TechTool Pro are released to ensure that your Protogo devices are up to date.