Update 1.0 to 1.2

[Harryws]

I started with a fresh NOOBS download with openplotter as per instructions.  Installed all ok on RP 3+ then changed passwords and went to Updates asked if wanted to update 1.0.0 to 1.2.0 answered yes and got this error in red
Downloading https://files.pythonhosted.org/packages/...ne-any.whl
Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)


  Etc etc 

TypeError: unsupported operand type(s) for -=: 'Retry' and 'int'

#### ERROR. ABORTING, PRESS ENTER TO EXIT ####

Need help