Have you tried resetting your Phoyoshop Preferences. The active Tools should not change when you open a document in Photoshop.
That's definitely not what should be happening, let us help make this right. Could you try resetting the preferences of Photoshop using the steps mentioned below & let us know if it helps:
To restore preferences quickly using a keyboard shortcut: Press and hold Alt+Control+Shift (Windows) or Option+Command+Shift (Mac OS) as you start Photoshop. You are prompted to delete the current settings. The new preferences files are created the next time you start Photoshop.
Yes JJ that is what I did following Juilanne Kosts video on pop files. It didn't work
Embarrassed and Apologising.
After a few experiments, I realised that this problem was occurring after I had run a set of Actions. I went through each one and found that one had ben modified and must have remained in Record too long and had picked up the use of the two tools. I have now reset that action and of course the 'problem' has gone away.
So you are human and make errors like the rest of us no Apology is needed. Error help us learn.