Uninstall Melodyne form your pc. Then make sure your pc is on the interweb abnd install Melodyne again. yuo may need to go to the Melodyne website to alter how its verified on your pc and change it from the ilock to a challenge code.
 
CJ

Been a while for this thread but I have a somewhat similar problem. Bought 2 Waves plugins a month ago, no problems. last week I bought Puigtec Eq from Waves. Before I could download it I needed to download Wave Central which replaces Waves License Center. I installed my new Puigtec Eq (also had to reinstall my 2 plugins from a month ago) and found that when I opened a project Melodyne was missing. Melodyne came with my upgrade Sonar to x3 Producer and was upgraded to Melodyne Essentials for $149 by Cakewalk two years ago. Has nothing to do with Waves..?? Need Melodyne back right away. Anyone have any ideas?

smybetts
... Melodyne came with my upgrade Sonar to x3 Producer and was upgraded to Melodyne Essentials for $149 by Cakewalk two years ago. Has nothing to do with Waves..??

Did you mean, "upgraded to Melodyne Editor"?  Essentials is the version that comes bundled.
 
Not likely related to your Waves issue, but stranger things have happened....
 
To try and fix it:  Reboot, do a manual reset/recan (important to do both) of your VSTs.

smybetts
Been a while for this thread but I have a somewhat similar problem. Bought 2 Waves plugins a month ago, no problems. last week I bought Puigtec Eq from Waves. Before I could download it I needed to download Wave Central which replaces Waves License Center. I installed my new Puigtec Eq (also had to reinstall my 2 plugins from a month ago) and found that when I opened a project Melodyne was missing. Melodyne came with my upgrade Sonar to x3 Producer and was upgraded to Melodyne Essentials for $149 by Cakewalk two years ago. Has nothing to do with Waves..?? Need Melodyne back right away. Anyone have any ideas?

I don't know about Melodyne and Waves together, but I can tell you I have had problems with Waves Central.
The good thing is that Waves help is really top rate. Send them an email or call them and they will work out any problem. At least that has been my experience.

Thanks JonD, tried reboot, manual reset/scan of VST's. Nothing changed in the projects that I have used Melodyne FX regions. Places on tracks where I have Melodyne FX regions, Melodyne is not there.  Also, when I go to Insert>ReWire Device>Melodyne Single Track(which I have never used), Melodyne is greyed out.

On other projects where I have not used Melodyne, I am able to Insert>ReWire Device>Melodyne Single Track, but still can't create an FX region on a track.
 
Thanks pharohoknaughty, Yes, with Waves Central, it seems I have moved licenses and reinstalled my three Waves plugins far to many times. I did get a message to Waves. This is it.
 
Dear Smy,
Waves cannot interfere with the functionality of other Plugins.
Sonar scans only one file named Waveshell.
If you wish to troubleshoot this, you may move the Waveshell from Cakewalk plugins folder and try to reproduce.
Let me know if you need any thing else.
Best Regards,
 
I have no idea how to move the Waveshell file from cakewalk plugins folder and reproduce.
 
HP dv7t-7300
System
Processor: Intel(R) Core(TM) i7-3630QM CPU @ 2.40Ghz 2.40Ghz
Installed memory(RAM): 8.00 GB (7.89 usable)
System type: 64-bit Operating System, x64-based processor
Pen and Touch: No Pen or Touch Input is available for this display
 
Windows 10 Home
Copyright 2015 Microsoft Corporation. All rights reserved
 
Focusrite Scalett 6i6, JBL 5" monitors, 1970 Les Paul Custom-Cherry Red(once owned by the guitar player from Crow. I am told;), I gotta get me a Lucky Hat..