lapasoa
[SOLVED] 
Thanks to Joe Cotton from Cakewalk Product Support Team and deleting some register keys now everything is fine.

I guess the next question is then what registry keys were these so we can help the next person...

Dear frieds,
that's the solution:
In regards to the start screen appearing offline, there is a cache folder you can clear that should bring all of your icons back. Try this:
Open a run prompt by pressing the Windows Key + R
In the prompt, type %appdata% and press Enter
Navigate to Cakewalk>SONAR Platinum>StartScreenCache
Delete the contents of the StartScreenCache folder
Relaunch SONAR


Stay good and well, cheers

lapasoa
Open a run prompt by pressing the Windows Key + R
In the prompt, type %appdata% and press Enter
Navigate to Cakewalk>SONAR Platinum>StartScreenCache
Delete the contents of the StartScreenCache folder
Relaunch SONAR

Even better. The solution does not involve the registry but a disk-based cache in the user directory. Thanks for posting the instructions.

Very useful! Thx

lapasoa
Dear frieds,
that's the solution:
In regards to the start screen appearing offline, there is a cache folder you can clear that should bring all of your icons back. Try this:
Open a run prompt by pressing the Windows Key + R
In the prompt, type %appdata% and press Enter
Navigate to Cakewalk>SONAR Platinum>StartScreenCache
Delete the contents of the StartScreenCache folder
Relaunch SONAR


Stay good and well, cheers

Thanx so much.  It looks like it is working now. 

Worked for me too. Thanks a mill guys.

NOT YET!
The issue is not yet solved.
After 3 or 4 sessions, Start Screen projects icons suddely disappeared!
So I deleted the roaming start screen folder again...and the projects icons reappeared. Wow!
But, after 3 or 4 more sessions, the projects icons disppeared one more time...................
I hope the next update should fix this bug. Bug? Yes, it is a bug.

lapasoa
NOT YET!
The issue is not yet solved.
After 3 or 4 sessions, Start Screen projects icons suddely disappeared!
So I deleted the roaming start screen folder again...and the projects icons reappeared. Wow!
But, after 3 or 4 more sessions, the projects icons disppeared one more time...................
I hope the next update should fix this bug. Bug? Yes, it is a bug.

It is still working fine here.  What are the details of your system such as OS, video card, sound card etc.