Reinstalling Sonar

Agentcalm
...to wipe my laptop and upgrade it to 64bit Windows (currently 32 bit)...

 
Before you start wiping anything, check that the laptop hardware is capable of running a 64-bit o/s. There may well be a good reason why only a 32-bit o/s is currently installed.

Cakewalk Command Center and the servers still appear to be online at this point, so do a backup first, then go for it!
 
The world seems to have moved on to 64-bit computing in the past few years, and I am glad I joined the 64-bit team a couple of years ago. 
 
It seems that as time moves on, more developers are devoting their resources to 64-bit only new releases.

As of this very moment, the Cakewalk user account are still operating so there shouldn’t be a problem authorising Sonar.

Sonar, Artist, Professional and Platinum are the only programs that need authorising over the Internet. There is a list of products/installers that you can see by selecting Sonar in the Command centre or your online account.

Sonar before Jan 2015, while available in your online account is not available in the Cakewalk Command Centre.

mudgelSonar before Jan 2015, while available in your online account is not available in the Cakewalk Command Centre.

I still have them all available & downloadable.

 If your computer support x64. Absolutely without a doubt! Go for it "IF" you have at least 4gb of RAM installed! If you have only 1 or 2 gb of RAM installed Windows x64 will be very slow and sluggish
And having a 32 bit version of Windows can't use more than 4gb of RAM you most likely don't even have any more than 4 gigs of RAM installed, so BEWARE you might not see any improvements in performance switching to x64, and maybe a little less, so you're definitely going to want to upgrade the amount of RAM installed, preferably to a matched pair (2x4gb= 8gb to run in duel channel mode) to at least 8gb. You should see a HUGE boost in power, stability, and track count.
And of course 2x8= 16gb is so much better (if your laptop can support that much RAM), especially if you use sample based DXi's like Rapture Session/Pro and Addictive Drums and or the likes of.

x64 bit versions of Window 7,8, and 10 require a MINIMUM of 2 GB RAM to run, x32 require a minimum of 1 GB.
No OS is going to allow applications use all physical memory because they OS needs to reserve and use some for itself. Hence, you can only maybe access 3.5 GB out of 4 GB, and that's actually pretty unlikely to happen with all of the background services, sharing memory with graphics cards and chips, and things like virus protection going on.
 Not to mention sharing 2 GB of RAM with any one App. with an x32 bit system is an extremely generous amount of sharing.
 
A x64 bit system with only 4 GB RAM might be OK for office work, but very sub par for reasonable performance for a workstation such as a DAW, and utterly abysmal for using hungry plugins (needs a strong and stout 4+ core CPU and fast buss speeds) and large sample libraries (needs ASIO drivers, lots of duel channel RAM and fast buss speeds).
 If not than things are NOT going to be going smoothly with a starving SONAR if per chance it goes at all.