Actually, as I read the End User License Agreement (EULA) which can be found in the cyberlink directory where POWERDVD is loaded, it does not restrict the software to one device, the only restriction is to one "user":
EULA
"* GRANT OF LICENSE & USAGE RESTRICTIONS
Below are the general license terms and usage restrictions followed by specific provisions depending on the type of license you have.
CyberLink, as licensor, grants to you, the licensee, a non-exclusive right to download and/or install the accompanying PowerDVD software program(s) (hereinafter the "SOFTWARE") on a certain number of computer(s)/ device(s) in accordance with the number of the license(s) you purchased and use the SOFTWARE in accordance with the terms contained in this license. You agree and acknowledge that you may receive SOFTWARE update, upgrade notices or any commercial electronic messages during the use of SOFTWARE.
...
**INDIVIDUAL CONSUMER
If you acquire the SOFTWARE under an individual license it is for your own use under the general terms above."
As I read the license, as long as I (the user) am only running one instance of the software, there is no restriction as to the number of devices on which the software can be installed.
This is more in line with cloud based software that does not apply hardware installation restrictions, only use restrictions.
As for your upgrade question. As long as you keep the key, you can reinstall PowerDVD and use the same key and it will reinstall. If, in the future, you purchase an upgrade to PDVD 19 (hypothetical) at reduced cost (license upgrade), retain both keys. That way if you ever need to do a clean install, PDVD will request the license for PDVD 19, recognize it is an upgrade key, and then request the previous version key PDVD 18 key, to allow the installation to proceed.
This message was edited 3 times. Last update was at Jun 09. 2018 13:53