Kraken had pretty good support. Told me to send in a claim by mail so I did. Hopefully that'll go through but if it doesn't then o well. I had long written off the MtGox loss in my mind, hence the reason I forgot the password (The days before I started using lastpass).
You missed the first deadline for filing a claim online, then they extended it to July 28, so you missed the second deadline by about a week. I don't know if the deadline for mailed claims is different. If you get lucky they might extend the deadline for a third time, or they might allow your claim due to mitigating circumstances.
http://blog.kraken.com/post/124002049592/mtgox-update-you-can-still-file-your-creditorThe MtGox trustee has announced that the deadline for filing creditor claims online has been extended to 8:00pm, July 28, 2015 PDT