I hope you installed the free version of Limewire from
www.limewire.com. I notice Snapdrive has many sponsored links which you could easily mistake as being part of Snapdrive. (I am not registered there. I just had a quick look at the site)
I imagine you go a part of the site to upload files, and I see you can only upload images if you are not registered. You will know what you can upload when you are registered. You will probably be asked to browse your computer for a file to upload, and you will have to go to your Limewire download folder to find the file (not Limewire itself) or wherever else the file may be if you have moved it. Your download or Save folder is located at the place indicated in Limewire >tools>options>saving>save folder.
I hope this helps