I've tried logging out and then re-entering login details but the app just hangs. Anyone else had this issue?
 
Thanks

Yeah I've got the same thing, tried a bunch of things and have had a long email chat with BandLab, nothing's worked so far, they've said there are updates to the BLA coming soon which will hopefully fix it

Did you try re downloading and install. 
Mine bonked out the other day and this fixed it. 
Delete the app first in Control panel.

joden
I've tried logging out and then re-entering login details but the app just hangs. Anyone else had this issue?
 
Thanks

Exit BandLab Assistant entirely (make sure you exit the app specifically as opposed to just clicking the close x) then reopen it and log back in. Then if you're still experiencing issues, definitely contact support and be sure to provide the error codes displayed in parenthesis on the Help | About page, and they'll be able to give you more in-depth things to try.

Tried the uninstall and re-download. Now all I get is the Bandlab app screen sorta greyed over and a little gif of four boxes alternating. No error codes appear at all. If I tap the cog wheel at top left it then brings up a box allowing me to log out??? I haven't even logged in yet....so I tried the log out option. The greyed out appearance disappeared and I the tried logging in again but it goes back to the same greyed out screen with the animated gif...

have you updated windows recently?

have you checked windows event log?
 

I ran into this too over the weekend on my laptop. It's wrth noting that my laptop probably hadn't been updated for a while. It's largely kept offline. I connect to the internet every couple months to make sure things are updated.
 
- This weekend I connected to the internet, ran BL assistant. It said all my BL apps were up to date.
- I launched Son....   er...   I mean Cakewalk...   and it told me I was in demo mode, and had to reauthorize.
- I tried the logout / login trick but it didn't work.
- So I re-downloaded/re-installed the bandlab assistant app, and this seems to have fixed everything because it said that CAKEWALK app had an update.
 
So far so good...
 

pwalpwal
have you updated windows recently?

Yeah a few days ago, but I thought re-downloading the app, and re-installing (after deleting) wold do something but it does nothing. Funny thing, as I wrote above...even though the app has been re-installed, when I open it it STILL gives the option to sign out (under the settings cog) which is really weird as I already signed out before uninstalling.

That dang things been buggy since day one, I wish they'd completely re do it and get some professional help.
Every time I use it I have issues so I stay away from it for a few months each time. 
I too just had to re install to get it to work when I wanted to just do one simple thing, update Cakewalk..
But if I remember the process was kind of sketchy.
I'm pretty sure I logged out, deleted it from Programs and Features.
Went to the Band lab site and had to dig around to find it, re installed and logged back in. Finally after all that I managed to update Cakewalk.
I don't miss the Command Center but this is a even bigger PITA.
 
Not sure what is causing your weirdness, but you might have to do a complete clean install.