- Login to your server
- Download "download1.html"
- Open "download1.html" with free program "NotePad+Plus"
- Look for this snippet of code:
<! -- if direct links -- >
<input type="submit" id="btn_download" value="<!-- lang create link -->">
<! -- else -->
<input type="submit" id="btn_download" value="<!-- lang download file -->">
<! -- ::::::: -->
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Change "submit" to "image" (as the type of input)
Change "value" to "src" and specify the URL of the image itself.
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This is the final result:
<input type="image" id="btn_download" src="http://yoursite.com/images/downloadbutton.png">