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You cannot solve captchas hosted on google.com or related websites, it's a new thing they added.

No there is no way, even the API doesn't encrypt anything

Config > Edit > Other Options > General > Tick the last checkbox, the one that says to save directly on disk without saving to the database. You must be on latest 1.2.2 to have this feature, any other version won't work.

This is reverse engineered code so it's hard to read :3

You can save hits to a text file instead of DB by selecting the related option in the config's Other Options > General page

Use the TCP block and make your request manually

In your case the path to executable would be the path to your python.exe, and the arguments will hold your py script for example script.py if in the current working directory. The stdout will be redirected to the variable with the name you chose.

You can use the element action, provide the xpath and check if the element exists, it will return True or False, which you can then pass to the keycheck

Sometimes if the remote service errors out (maybe due to too many requests) OB will prompt a warning and stop warning. This will be solved in OB2, OB1 is not supported anymore sorry.

Yes, you need to hook onto something else, for example pull all input elements and then get the one with the correct index