We cannot afford to support the old version and iCloud right now. 
The infrastructure is old and behind modern building codes basically. Hope to build back up to it but I can’t offer a timeline yet.
I posted on the overall situation and launch so far here if you are curious: State of Clear: Post Launch & Looking Forward - #23 by phillryu
If you relied on sync and especially with Clear Mac, you can contact me at phill@impending.com for a refund to go towards a syncing replacement.
Are you saying it’s not possible to load in from iCloud as in you had uninstalled Clear / reinstalled it on phone and it didn’t sync in your lists as expected? I could possibly help in that case but need some more info.
The reminders are there but were moved, you can access swiping right past checking off an item. I apologize about the confusion and not communicating this change and the iCloud regression properly!