Hello,
It is actually a small limitation of the Free license. However, it's still possible (and it won't break any current free license policy) to remove it by parsing the ltlTags literal in the OnPreRender or Render method as described my colleague Zdenek.
As for parsing itself, please take a look at the following example:
How to change HEAD tags (it applies also to 5.x versions).
Best regards
Ondrej Vasil