Hi Aarona-borg.
Welcome back to the community!
I have 2 suggestions as to how we can get this resolved for you.
1) Click on the 'Open a sample company file' and then load this up. Once the sample company file is open you will be able to choose the 'File' menu from the top tool bar, and then choose 'Open or restore company' and restore either a backup file of your company (.QBB) or the actual working company file (.QBW)
2) If it is the case that nothing at all is responsive with the trial, I would suggest first entirely closing down the QuickBooks trial and reopen it. If that does not work, I would suggest completely uninstalling the QB 2016 trial and then re installing to see if it will become any more responsive.
Which old version of QuickBooks desktop are you using?
Thanks,
Chris.