Probably. Everything has been tested in multiple DAWs, but try the demo first to make sure. Expecially if you're using an obscure DAW.
Fresh installs and updates are the same: For Windows run the setup executable file. For Mac OSX, open the .dmg, and copy the 2 files to their folders in the disk image.
After you enter your serial number and restart your DAW, the demo will unlock and become the full version. Click the settings button () to register.
The license is per-user, so you can install the software on all the devices you own, providing you only run one device at a time.
We use Paypal as our payment service provider. It's secure, easy to use, and you don't need an account. Once you have purchsed a license, you will be emailed your registration code, and you can access the website at any time to view your licenses.
First you need to register for an account. Any purchases are linked to this account so you can review purchases, and serial numbers at any time. After you have registered, head over to the shop and choose your product.