The software can be used as freeware for private use on as many computers as you like for as long as you like. You can even distribute or transfer the software for free under the terms of licence!
This program is FREEWARE with limitations, which mean, that you can merge only five pdf-files in total together, only the first fifty pages can be split. The charged Pro-Version is free of these limitations. For commercial use, it is necessary to upgrade and pay for the pro version after a trial period of up to 30 days.
Based on the named user licensee model, you can purchase one (1) single user license or multiple user licenses (>1 users), if necessary.