Your email signature will only automatically update if have installed it via your signature key. If you have installed the email signature via your HTML file then your signature will not automatically update and will require you to re-install it with the updated file after making changes.
If you have your signature key inserted, you should check that the key is correct and current with your email signature in your account. Go to your dashboard and ensure the key matches the one installed. If it does, go to the installer app and click Preview Signature, if the signature has updated in the preview but not within your email client then let us know and we'll look into the issue further.
Current Flash Player 18 users who have enrolled in the \"Allow Adobe to install updates (recommended)\" update mechanism will be automatically updated to the latest version of Flash Player over the next 24 hours. 1e1e36bf2d