They should be submitted automatically as part of the next auto update if you don't change the settings on that screen.
You can also do a manual update (probably better so no wait) and that will start the process off, first avast checks for updates and downloads any signatures and then it would upload the suspect files (and they are highly suspect). If you monitor the manual update you should see the upload process.
I would then suggest that you rename these files, place SUS (for suspect) in front of the existing file name. What this does is any registry entry or process that would be trying to run these file names wouldn't find them.
- Ensure that you have hidden files and folders enabled and disable hide system files in Windows Explorer (or you may not find them), Tools, Folder Options, Hidden files and folders, uncheck Hide extensions for known file types, etc. see image.
Generally you don't get contacted when they are uploaded in this way as they don't have your email address the info uploaded is anonymous. What you would find that the file would be detected in the normal avast on-demand/boot-time or resident scans as a signature would be added to detect the previously suspect file. I highly doubt that they are OK.
What is your firewall ?
If you haven't already got this software (freeware), download, install, update and run it,
preferably in safe mode and report the findings (it should product a log file).