I couldn't tell you one way or another or even if there is grounds to sue, I'm not a lawyer. I suggest you call a securities attorney, FINRA, and/or the SEC and run those questions by them.
All I can do is speculate IF the SEC decides to step in after legitimate complaints are filed, there's a decent possibility she'll return the true value back to NXGA simply to avoid destroying her name and potential criminal charges.
I'm a non-professional individual investor who may own, not own, buy, or sell stock at any given time in any security ever mentioned in posts. I never accept compensation in any form to post. Always consult an investment professional when investing.