I was wondering if future versions could support a way to change the command symbol. For example change the "." to "!" because I would prefer it that way.
Make a request to Eggheads but, as only you like it that way doesn't mean everyone else does. The other alternative is for you to search through the code and change it yourself.
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There's 1 key for a '.' while for a '!' you need to press SHIFT+1. Which is easier? even if that's not the case on your keyboard, your request is still not important and not necessary - get used to the '.' (my advice).
I believe you could easily change it in the source code by changing the filtering trigger (which determines if its processed as command or message) from . to !. In the help files its a simply replace (maybe a regex capable editor might be usefull... and no, there are plenty free/shareware ones).