Adobe Creative Cloud apps stop working after a while if they can’t phone home. Adobe Creative Suite apps do not.
“After Adobe Systems' acquisition of Macromedia in December 2005, Dreamweaver 8 was added to Adobe Creative Suite 2.3 and was later succeeded by Adobe Dreamweaver CS3.“ [1] (Replacing Adobe GoLive, good riddance)
So you could use up to Dreamweaver CS6 with just a serial number (usually requiring one-time internet activation), but anything newer requires regular internet access.
“After Adobe Systems' acquisition of Macromedia in December 2005, Dreamweaver 8 was added to Adobe Creative Suite 2.3 and was later succeeded by Adobe Dreamweaver CS3.“ [1] (Replacing Adobe GoLive, good riddance)
So you could use up to Dreamweaver CS6 with just a serial number (usually requiring one-time internet activation), but anything newer requires regular internet access.
[1] https://macromedia.fandom.com/wiki/Macromedia_Dreamweaver_8