I just bought upgrade to Vegas 17 and there is no activation code for the titler plug in ? Anyone else had this and how to resolve ?

Have you tried contacting them?
Email: infoservice@magix.net

Ian, Titler Pro activation would not be affected by the version of VEGAS you are using *unless* you were using a bundled version. The main case where I can see this happening was if you were using the Vegas Pro 14 bundle (which had a version of Titler Pro 3) and are now using a newer version.

That bundle will only work in 14 without a watermark so you would definitely see a watermark in version 17 if that is the case.