Hope this helps:
I got the corrupted file a lot when I used their free conversion but now I have Wilcon free downloaded and I have never had another problem converting my files (except for learning to center the design before saving).. I don't have the link but it is great and I am sure you could google.
If you don't have it - let me know - as actually I am really the only one that should be passing it around.
The design is here -
That was my problem when I tried to convert it with the free conversiontool on embroiderydesigns.com. Now I have embird and that does it without any message or errorwarning. Didn't stitched it until now but I can send it to you for a try ;o)
Greetings, Bettina