You can use the Img tags for images only if you upload your image to another image hosting site and then include the URL for the image between the Img open and close tags.
Otherwise, you have to attach your files. This FAQ explains how to attach files but, generally, you should use the “Add and Attachment” section in the reply screen.
Note that Windows, by default, does not show file suffixes that it thinks it knows about. So the .log file may appear as a file without a name. So I think you found the correct file. You can alter the options in Windows explorer to show full file names.
To install the latest release of MyEclipse, please download the installer from here: http://myeclipseide.com/module-htmlpages-display-pid-4.html. You will need to click the Accept License Agreement before clicking on the appropriate edition that you want to download. You don’t need the configuration center to install it, just run the downloaded installer. For recent releases, you need to activate MyEclipse but you will be prompted to do so and you need no more information than your license name and key.