Yes, we have different licensing configurations (node-locked, floating). Floating licenses are sold with a USB licensing key.
Ex. If you purchase a 1-user floating license, then only 1 client on your network can use the software at any given time. If you require 5 simultaneous clients, you need to purchase a 5-user floating license. There is however, no limitation on the # clients that can install the software.
Regarding the results: Please send your OptiSystem file to email@example.com with a description of which results are differing from 14.1 to 14.2. We will have somebody from our team take a look for you.
The price listed by the other forum member is not accurate (as it depends on several factors). Also, we have several purchasing options (lease/perpetual, standalone/network, etc.) that all affect the overall price. You would need to contact us via email in order to receive a formal quotation.
Note: Please do not post product prices on our forums!