One thing that concerns me here is you saying you do not have access. Does this mean that the program is not allowing you to uninstall it? Or that you do not have administrator access on the machine?
If it is not letting you uninstall it, anti-malware and anti-virus programs may not help you. Rocket Tab and programs like it are categorized as PUP's. Many anti-malware and anti-virus programs are able to identify and remove the main executable file associated with these PUP's, but more often then not they are unable to completely remove such things from your system. A PUP is a Potentially Unwanted Program. It is not, unlike many believe, a virus, worm, trojan, a piece of spyware, malware, or another such malicious threat. As such, programs that are designed to deal with these malicious threats do not have the complete capability to remove them. The main reason being is PUP's often resemble programs that you INTEND to have on your system. They are browser plugins, shopping guides, they are things that some users choose to have on their system. The difference is not readily perceivable to anti-malware and anti-virus programs.
The best method to remove these programs is a combination of the malwarebytes route and a good old uninstaller, followed up by a manual reset of your browser. Ccleaner and programs like it are best employed in this method, to thoroughly remove all files associated with your browser and content. Follow that up with a reset to default in the browser itself and 99% of the time you'll find the problem is removed. I'm not saying that malwarebytes and such programs are of no help, quite the opposite. They are rather necessary for the completion of the entire process. But they alone are not usually enough.
Hope this helps.
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