Previous important discussion:
Yoda correctly notes that in general, vendors of programming tools are not forbidden - under certain circumstances, even welcome - to actively post self-answered technical questions here.
However, in this specific case, even without the spammy feel, the question would not be a good fit for Stack Overflow even if it had organically grown from a genuine user's specific need. The question deals with a licensing issue specific to the trial version of a product. Had it been asked by a genuine user, that user would most certainly have been directed to the vendor's support resources, and the question closed as off topic or not a real question.
While programming issues related to the product might have merit (if the product has any real relevance in its market, which I'm not convinced of) this one definitely does not IMO.
In the end, the community will have the final say by casting (or not casting) its votes, so a lot will be down to how you present yourself. From the FAQ:
The community generally frowns on overt self-promotion and tends to vote it down and flag it as spam, so be careful.
If you want your question to survive, strive to give it as much substance as possible, and make sure it's really relevant to the community. To borrow a StackOverflow catchprase, show that the Internet is a better place because of the presence of your self-answered question on SO.
Another good thing to do is to do other things with your account than just promoting your product. Being active within the community sure helps when it comes to judging borderline cases, and getting advice on how to fix them.