I've read some stupid, loopy things about my little program - for what it is usabel, for what not, and what it lacks. And I thought "hey, those guys don't have a clue about what I am using this software for, and they even haven't noticed the range of functions". So let me point some things out:
TkDo looks simple - is it usable for professional demands?
Why not? Why should a professional software look complicated? Or why can't a powerfull application be easy to use?
It is written just for professional usage - there was no thought about private demands. TkDo is simply what the author needed to manage his companies! But of course it can handle private requirements, too.
How can I remove old jobs from the trash?
You don't have to. If you mark a job as done, it will be moved to the trash. There it will remain for seven days, so you're able to restore it (sometimes a done job goes on due to new requirements of the customer, so you get all your notes back). After these seven days in the trash it will be automatically deleted.