Ignorant Question re. Sandboxie Plus: Does one certificate cover two installations on different computers? -- jclarkw
What do you mean by ignorant? Asking a question, of any type of any topic, is because you, me or whoever, is ignorant in such topic. Ignorance is implicit in any subject when asking a question, isn't it?
If you're referring to supporter certificates: check out the "PC's per certificate" row in the comparison table (https://sandboxie-plus.com/feature-comparison/) All certificates for personal use (i.e. not business) have at least "Personal" so they cover all personal devices.
Provided they are on devices you own in your home there is no problem installing on more that one device. Scroll down to the bottom of the page that @dodo1 linked to for explanation.