In order to upload log files, you need to install a client application. You can choose which uploader you want to use below. The Electron uploader will be replacing the Adobe AIR one eventually, but for now you can install either one.
To use the Adobe AIR uploader, you need to download and install Adobe AIR from Adobe's Web Site. Make sure ad-blocking is turned off on Adobe's site, or you will not be able to see the download link for AIR.
Once you have Adobe AIR installed, you can download the client from the link below.
The Electron uploader is in beta, and it will eventually replace the Adobe AIR uploader. To try it out, click the link for your platform below.
If you are using a language other than English, this uploader is recommended over the AIR-based one, since it will support localization very soon.