(They turn that file into a Collection!)

1. Open MTGO and Log in
2. Open the Collections tab and make sure to select "Show Versions Seperately" under the View dropdown
3. Right Click -> Select All
4. Export Selected Cards
5. Save as a CSV file somewhere you can find it
6. Go to MTGO2Decked
7. Click on Choose File and select your CSV file from MTGO
8. Click Download CSV File! and save it somewhere you can find it
9. Go to Decked Builder's site and enter your email in the first text box
10. Click Choose File and select the file you saved from MTGO2Decked
11. Hit Upload, and wait for the email with your shiny new collection!

*Promotional Cards (Pending support by Decked Builder, I've done all I can)

*Duel Decks: Mirrodin Pure vs New Phyrexia (Pending support by Decked Builder, I've done all I can)

*Magic Online Deck Series (Pending support by Decked Builder, I've done all I can)

I'm almost certainly missing some set codes from MTGO. Basing this off my collection. Try to use MTGO2Decked again, but with your javascript console open. Make an issue with the text found there, and the actual set name of the card that caused it if you can tell.