How do you exit when running from Pythonista?

Works perfectly now, thanks

I tried it, and I get this stack trace:

****************************************
*     Dropbox File Syncronization      *
****************************************

Loading Local State

Updating From Dropbox

Saving Local State

Checking For New Or Updated Local Files
    Uploading:  DropboxSetup.py -- Not Found Remotely
Traceback (most recent call last):
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/Synchronator/Synchronator.py", line 300, in <module>
    check_local(dbx, state)
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/Synchronator/Synchronator.py", line 207, in check_local
    state.check_state(dbx, path)
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/Synchronator/Synchronator.py", line 66, in check_state
    self.upload(dbx, path, '-- Not Found Remotely')
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/Synchronator/Synchronator.py", line 171, in upload
    mute=True)
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/site-packages/dropbox/base.py", line 1252, in files_upload
    f,
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/site-packages/dropbox/dropbox.py", line 249, in request
    timeout=timeout)
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/site-packages/dropbox/dropbox.py", line 341, in request_json_string_with_retry
    timeout=timeout)
  File "/private/var/mobile/Containers/Shared/AppGroup/256C51EF-C1A2-4394-964A-C26B18D4F04B/Pythonista3/Documents/site-packages/dropbox/dropbox.py", line 385, in request_json_string
    type(request_binary))
TypeError: expected request_binary as binary type, got <class 'str'>

Yes, I use an iPhone. That explains it, then.
It would be nice to be able to access previous versions directly from Editorial, hence marquito rises a valid point

Because that doesn't work, at least for me. For every file, the only item in the menu when I click on the Dropbox icon is "Share Dropbox Link"; however, when I go to the Dropbox site, I can see all the previous versions for every file.

When I add a Math action, and try to edit the Expression field, I get only the Telephone keyboard, with no option to change that to a different keyboard. It is still possible to insert variables with the extra rows, and I can paste an expression I copied from somewhere else, but I cannot directly insert an expression with anything different from numbers and variables, so not even the arithmetic operators (+, -, *, /) are available.