Yes, I used the same installer to install on all machines. The only difference is time - the working machine has PDF Architect 5 installed in Feb 2018, while the other machines installed recently in March 2018.
I have attached a screenshot taken from the working machine. Not only the required sizes (A0, A1) are available, there are also much more choices given in terms of paper sizes.
If there are any additional settings that are needed to make the paper sizes appear, please let me know.