Our update to version 4.3.1 introduces a new feature called "Capture+Do". It allows you to take a screenshot and immediately post it in your Slack or Trello. We decided to use a 'cmd+shift+7' hotkey, but it's conflicting with Google Docs or code editors like Sublime Text.
Since that combo is hardcoded, please remove the 4.3.1 and install 4.3.2 which allows you to record your own combination in Preferences -> Shortcuts:
Here is a link to download our latest version: www.getcloudapp.com/download/mac.
Shortcut settings in 4.3.2 Beta