I think that there may indeed be a file-synching issue. I've Skyped with three people that have had this issue and none were seeing any activity from the AddOns website in the activity stream in the HOME tab of the CC desktop app as we attempted to Add and Remove TKActions V4 via the AddOns website. However, for all these folks, updating/reinstalling a previous version of their Photoshop application did result in a statement in the activity stream that the update had occurred. So the CC desktop app is recording application updates in the activity stream but it's not recording activity from the AddOns website even though they had the same Adobe sign-in ID for both the CC app and AddOns and were logged into both. All these folks had file-synching turned on the the CC desktop app and all were running the latest version of the desktop app (2.1.3.121)
Since the downgrade to CC 2014 and then the use of Extension Manager with CC 2014 is what appears to be a solution for this problem, I'm reprinting it below step-by-step:
- Reinstall PS CC 2014 per the directions on this page: https://helpx.adobe.com/creative-cloud/help/download-install-app.html. (Click on the "Install previous versions of apps" link to go to that section of the page. )
- Open Extension manager from the CC desktop app and make sure PS CC 2014 is showing in the Products column. (If Extension Manager isn't installed, install it using the CC desktop app. If it says an update to Extension Manager is available, update it and then open it.)
- Visit your "My Add-ons" page on the Adobe Add-ons website: https://creative.adobe.com/addons/ (My Add-on is a link along the left side.)
- Click the "Install issues?" link below the Install/Remove button.
- Scroll to the bottom of the page that opens and click the "Download using Extension Manager" link at the bottom.
- Download the file and open it. Extension Manager should then install the TKActions V4 panel in the PS CC 2014 application.
- Now open PS CC 2015. On the menu, click through Window > Extensions >TKActionsV4 to open the panel.
NOTE: You must have an active subscription to the Creative Cloud for this to work. A trial subscription will not permit the necessary downgrade to PS CC 2014.
There will undoubtedly be some folks that experience problems with this procedure. If you email me from Feedback Form and have some screen-sharing capability (like Skype) I'll be glad to help you explore alternate solutions.