Hello Ansgar,
I'm a daily user of HeidiSQL. In fact, it's a crucial part of my working environment. I'd barely be able to do my job without it!
However, I do notice there are things which you do not seem to be getting around to fixing, which I expect is simply because there is so much to do.
For example, I notice that searching does not work in your forum. When I search for "bit", "BIT" or "Bit" I get no results, even though if I do it through a ctrl F
search in my browser I see various posts which contain "bit" or "BIT" in the title.
I also notice that forum posts seem to "disappear" after a little while, even though the bugs described in them have not been fixed. I don't know if that part is intentional, or if you are missing a "next page" button or something. I noticed particularly because 2 bug reports I have posted in the past have disappeared, and they are very much still present.
So my question is, would you like some help with what you're doing? I could help you fix issues on your site for example.
I could possibly also help with the actual software (I just noticed the source code is available), but I must admit I've not looked into that yet, so I haven't checked what language you use etc.