Can I buy Quicken 2019 from Australia?

@CNegus007 Quicken 2017 (and its predecessors) had a problem with slow launch times for users who had large, longtime data files -- but 5 minutes is far longer than I ever heard anyone report. That problem was fixed in Quicken 2018. Similarly, there was a delay in quitting due to the time it took to create an automatic backup file -- but nowhere as long as 5 minutes; that too was improved in Quicken 2018. I'm not aware of any change in launch or quit speed under Mojave. I still keep a copy of Quicken 2017 on my laptop running Mojave; it launches and quits reasonably quickly. I haven't seen any reports similar to yours, either. Sorry not to be of help.

@Quicken Harold If you read the thread above, the user is aware that Quicken will not work with Australian financial institutions; however, the user actively uses Quicken 2017 for manual data entry and wanted an update to Quicken 2019. Many people around the world use  Quicken on such a basis, even though it isn't sold in other countries. (Also, the Recon software you recommended is more like Quickbooks than Quicken, from what I can see; it's for businesses and accountants, not for personal finance, and I doubt it imports Quicken 2017 files, which would be necessary to support the poster's issues.)

@CNehus007 Have you logged into Quicken.com to check what it shows in your account? If it shows your Quicken Subscription, you should be able to download the Quicken application from there and install it. If it doesn't show your subscription, I recommend you follow through as suggested above with Quicken chat support, having your proof of purchase (credit card receipt) available to prove you made the purchase. At worst, they should refund your payment and you could try again; at best, they should be able to activate your subscription and allow you to proceed.