Bug report - where to post?

I have a bug report whereby I can reliably crash Heidi portable (9.3.04984) and nightly build r5044 by simply editing a field within a table. One example is below - part of a password system, and has the structure shown in the attachment. If I try to edit the data by changing the 'shadowLastChange' column for an entry, I get an exception as shown.

I've also attached a bug report file generated from a editing a different row in a different table, so I guess it's the grid editor not the specific table...

Hmm. The attachments fell off. Trying again...