What about situation like this? It looks like sonar is 100% downloaded by assistant but there is no possibility to install it. I switched firewalls and antivirus off. Downloaded files are in download folder. Did anyone of You have the same problem?
 
Screen of assistant:

 
 
 

Hi you must INSTALL through BandLab assistant. Trying to run the installer manually will not result in a successful installation.

Is it some incompatibility with Windows 7?
Does it lack any complement?

Hey guys we're pretty sure we know whats going on and it will get fixed next week. It appears to be an incompatibility with powershell and some systems. 
To understand whats going on better can you share what is the error code listed next to the serial number in the about box? It should be two numbers like this (xx,xx)
 

Thank you thats helpful. It looks similar to a problem we are investigating in BandLab Assistant.

This is what I've found...
 
- The initial install needs to be via BandLab Assistant; since you're logged in to BandLab (which you have to be to download/install Cakewalk), the authorisation process works, and a file is written to the ProgramData folder (see below) which contains the information for Cakewalk (the DAW) to know it's been authorised.
 
- Subsequent installs can be using the cakewalk.exe file that BLA downloads to your Downloads folder *provided* you haven't (like I did by accident!) futzed with the C:\ProgramData\Cakewalk\Cakewalk Core folder's contents too badly.  If you have, you'll need to re-run the installer via BLA, which necessarily re-downloads the cakewalk.exe installer.
 
- Once you've installed correctly, you don't need to be running BLA and can sign out of BLA should you want to (probably uninstall it even, although I haven't tested that!) - it's the initial installation that requires you to be logged in and installing via BLA.

There should be 3 background processes called BandLab Assistant when "X"ing out of the app. To completely shutdown BA use the Quit option on the menu attached to the gear in the upper left of the BA UI.

Kev999
I've just downloaded and installed the BandLab Assistant update (v3.0.6) but this didn't solve anything. CbB remains in demo mode.

What happens if you open BandLab Assistant and sign in there.  From the Apps tab in BandLab Assistant, uninstall Cakewalk by Bandlab and then reinstall Cakewalk by Bandlab.

I got out of this problem by:
 
Making sure I had Bandlab Assistant 3.0.6 installed (not 3.0.4)
Un-installed CbB
RE-downloaded CbB (it didn't work if I tried to use the original download files)
Install CdB using Bandlab Assistant.
 
Although this re-install stuck at 100% and didn't complete, I terminated Bandlab Assistant and ran the files which had been downloaded, and all went well.
 
In my experience, missing out any one of these steps resulted in failure to cure Demo Mode.
During one of the many failed attempts, I did see that Bandlab Assistant in Task Manager tries more than 46 times to open Powershell, which speaks to Noel's point above.
 
Hope this helps.
(Got immediate feedback from Cakewalk support by email, by the way)

3 reinstalls in 3 days... CbB still seems to think it is in Membership mode, with an expiry of today, so I expect I'll be reinstalling again tomorrow. With a poor broadband connection, having to re-download every day is painful. Can't we just get a licence code to change this to an "owned" product and stop this Demo nonsense?
 
Edit: Now it says 10/10/2018. Maybe my eyes deceived me.

promidi

Kev999

Jon Sasor [Cakewalk]
...If you run into demo mode for some reason, uninstall/reinstall from there...

I clicked on the "Uninstall" option in BA. Nothing happened. CWFB is still installed. Even clicking on "Open" in BA doesn't do anything either. Is this meant to launch CWFB? I'm getting the impression that the problem here is with BA rather than CWFB.

Uninstall CbB via "programs and features" in Control Panel.  Run BA 3.06 and log on and then reinstall CbB from there.

 
OK, I've now done all that. The end result was no different.

Hello all,
I have removed all bandlab downloads until they correct this. It is a little funny that the donate page appears first and waits a long time before loading with the tab to run. Seems no donation=no undemoed mode. Lol. Will wait for proper downloading. One thing I have to state. Hooray for Meng, but he did not rescue cakewalk, he saw and grabbed it from a business point of view. Even though he said he used it, he still saw, and sees it as a viable service for his company. Remember, it still is about business. OK, enough of that stuff. Thanks again Meng. Now, just need to be able to open it to see how it is.     
MJ

Jon Sasor [Cakewalk]
If you get persistent issues with auth, please contact support, so we can get more details.

i hope that doesn't happen again...pain in the bum... re-installed CbB...all's good again...not sure if another Bandlab Assistant update will screw it up again though..