I've been running 1Password 4.4.3 on a Mac with OS 8.5 (Mountain Lion). I recently upgraded the Mac to El Capitan (10.11.6). That's as far as I can go (old machine) so no 1Password 7 for me (until and if I get a newer machine).
I have a license for 1Password 5.4.3 but can't find that app on your website. Consequently I downloaded 1Password 6.8.9 which is running in Trial mode. I thought I'd try using the 5.4.3 license but when I select Add License menu it brings up a file selection dialog. My license is in the form of a long string of alphanumeric characters (i.e., no file to select).
I tried going back to 4.4.3 but it shows no information (blank display). I assume that installing/running 6.8.9 modified the stored data structures since they do display in 6.8.9 (thanks for not warning about that by the way ... very convenient to lose access to the data ... or maybe the data was moved from where 4.4.3 expects it [Dropbox] ... just as convenient).
Anyway, I'm fine using 6.8.9 but not with paying full price for it. I paid around $25 for the 1Password 5 upgrade. I don't want to pay full price for 1Password 6 (having already paid for an, apparently useless, 1Password 5 upgrade, admittedly many years ago).
Do you have a solution?
1Password Version: 4.4.3, 5.4.3, 6.8.9
Extension Version: Not Provided
OS Version: 10.11.6 (El Capitan)
Sync Type: Dropbox