I have not upgraded to Yosemite yet and I'd like to buy a licence. Will a licence for for V5 work on 4.4.3? When I upgrade to Yosemite in a few months, will that licence still work when I upgrade 1Password to V5?
I just saw your post and recently had a similar issue. Take a look at this conversation and it may help: https://discussions.agilebits.com/discussion/30351/how-do-i-license-1password-version-4-4-3-version-5-license-also-works-with-version-4
@louismg, Leo's link will answer the question but just to answer quicker, yes. 1Password 4 and 5 uses the same license file as 1Password 5 is a free update to 1Password 4.
Before you proceed, please make sure you check this thread first: https://discussions.agilebits.com/discussion/30446/icloud-changes-in-the-website-version-of-1password-5. Basically, if you ever plan to use iCloud sync, you have to get 1Password at the Mac App Store instead, not our webstore.