You may find the answer for yourself
Yes! Your license includes three activations, so you can authorize your library on three devices in the same time (computers and/or iLok USB keys) using the iLok License Manager application.
Yes, as showned in the UVI Workstation manual, you can add effects with the 'fx' button in the desired part. You can also use the effects from your DAW when you use UVI Workstation as plugin.
The download can be interrupted, depend on the traffic on the server. You can try to download it again. If the problem persists, please write a message to: psound to receive an alternative download link.
The library must be activated to your computer (or your iLok USB key) before loading it in the UVI Workstation. Please use the iLok License Manager to transfer the license on your computer as shown in the "installation guide" video.
You need to register an user to complete your purchase. After that you should back in your account "MYPSound page" to find a list of your orders with download and authorization links.