If you used the app lab version of Arkio (now called Arkio - beta) before the official release you can transfer all your models and imported files to the official release using the file transfer utility that is included in the last app lab release v1.1.2
When the transfer completed we will show you a transfer code that can be written down somewhere or you can make a picture of it using the Meta screenshot tools and find it back later. If you lost the code of forgot it you can just start another transfer from the Arkio - Beta app. The transfer code can only be generated from the 1.1.2 version of Arkio - Beta in Applab and this code does expire after some time but you can always start a new transfer again.
Now you can fill this transfer code in the latest official store versions of Arkio to receive all your files here. Just open the transfer app lab button from the home panel and fill in your transfer code here (non-case sensitive)
All your scenes and imported models that where placed in the scenes should now be available to you in the official Quest store app