Now the Yahoo forum is no more, you should report any issues on Github.
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.