Thank you for your post.
Currently, the trial version is a trial of PlusSpec Pro so you should have access to all features that are included in Pro. Would you be able to please confirm if you entered either 90 (for degrees) or 1:0 (for ratio) into the Pitch field?
At the moment the only colours available are the Taubmans but we are working on adding more brands here. In the meantime what I would recommend to do is to draw the base material (the material before a paint is applied - e.g. brick or render) then go to the SketchUp Bucket Tool and select the Sample Paint (eye dropper) icon and select the base material. Once you've done this, select the 'Edit' tab in the SketchUp Bucket Tool then tick the 'Colorize' option and and change the colour values of the material. Please note that this won't be remembered in your future models.
Would you be able ot please let me know if this works for you?