Install PSE 2018 on second computer
I am having trouble installing PSE 2018 on second machine [macOS]. I installed PSElements 2018 from official disk to iMac in Jan 2018. Now want install onto MacBookPro. My understanding is that only one machine can be actively using PSE at one time. That's fine with me as I would only use copy on MBPro if other computer was not being used.
Inserted official disk, entered serial number at prompt [I got that the first time I installed last Jan], logged in with 'Adobe ID', then got this dialog box.
The username was not my login user name [an email address], but rather my real name. I tried my computer admin password, and then my Adobe ID password multiple times. Neither was accepted. I changed the user name entry to my actual Adobe ID username. Still all entries were rejected.
Am I really entitled to install on more than one machine? How do I make this happen? Tried chat at Adobe help - waited 40 min with no reply, so that seems useless.
Can anyone [esp. Adobe staff] help?

