For me, Cakewalk Sound Center (Synth Rack) and addictive drums were missing when I started opening up my existing projects in cakewalk by bandlab. only usable in platinum, despite bandlab's stellar intentions and efforts so far.I recovered addictive drums by opening up plug in manager under utilities and checking the show excluded and show permanently excluded boxes till addictive drums(2) showed up. Then I clicked on enable and now it works.
Cakewalk sound center was a little harder. I did a windows search on my entire c drive, which took about 10 minutes. Sound center was located in my program data and program(86) folders, which are not included in bandlab's migration default 3 vst scan folders. I added the folders to the vst scan folder list then saved it as a new plug in menu layout. I named it cakewalk by bandlab.
By doing this, I have not moved any folders, so I can continue to check new cakewalk vs sonar platinum project by project, so if the day ever comes that I can no longer open sonar, I will have proactively and independently saved every plug in I have and I'll be happy.
I urge you all to join Meng's thread asking for your feedback and instead of giving bandlab 1000 different ideas, urge him not to dismantle command center and Sonar yet. We all need time to open all our existing projects and find our missing plug ins. Opening bandlab's version will show us which are missing, opening sonar will help us find them quickly, and the plug in manager will be how we migrate them over to the new cakewalk ourselves.Once sonar is gone it will be harder to fix without outside help. Special shout out to our forum host. Thanks for the inspiration. I will continue to edit this as I discover more.