Now the Yahoo forum is no more, you should report any issues on Github.
If you need support then you should head over to the Support Forum. You will find current users and the authors of TinyCAD ready and willing to help.
The TinyCAD manual is included in the installer but can also be read on-line as part of the TinyCAD wiki.
If you feel this manual could be updated in any way, then please go-ahead and edit the Wiki for the benefit of others. There are tutorials on the Github site on how to edit Wikis.
You can find a few more video tutorials on YouTube.
To post a question directly to the developers, log bugs or request features, then then use the Sourceforge Ticket tracker.