I would doubt it, otherwise we'd all be able to upgrade continuously, at no cost. A quick search on the web showed the installer is available for download. No idea if any are kosher. Alternatively, if Filemaker Inc. permit it, you could try and find someone else with an 8.5 installation disc who can make it available to you.
" A quick search on the web showed the installer is available for download"
I am sorry, but I couldn't find any!
There is just trial version download link, which askes you to buy license.
Please, show me a link if you found some. Thanks!
Sorry - I didn't click through. Do they not let you enter your license number at install?