In the main section of the Downloads window you will find details of active downloads as well as some that have failed or been completed. Located to the left of these details is each respective file's icon.
The first detail shown is the filename itself (i.e., GoogleSketchUpWEN.exe). The remaining items displayed for a download will vary depending on its active, completed, or failed status.
For active downloads, a progress bar is displayed directly below the filename informing the user how much of the download has completed thus far. Under the progress bar are the following items: file size downloaded, total file size, current download speed, and approximate time remaining. To the right of these details is a Pause button which can be used to halt and resume the download in question. Also, to the right of the progress bar is a Cancel button which will prematurely end the current download.
For completed, canceled, or failed downloads, a status is displayed directly below the filename. In the example below, the file "ReaConverter.exe" downloaded successfully. Directly below the filename you will find the full size of the file as well as the site where it came from. To the right of the filename you will find the date/time that this particular download completed.