Collectible Card Game Headquarters

please help. everytime i try to open/load the deck it just appears as numbers, e.g, 0069.dck and get the error: "java.io exception".

Please read this carefully. Follow the instructions one at a time and see if this fixes your problem.
http://www.slightlymagic.net/wiki/Updated_Deck_Editor

I have literally no experience with the deckinjector (custom version). Just browse through the forum and you will see there are a lot of issues with it.
If you can´t get it to work at all, then please just abandon it and use the "official" Constructed / Limited versions.
Hopefully someday we will be able to break the 2000card limit to make all those different versions obsolete, but this will take some time.