I have version 16 of Partition Manager free version.

I have a hard disk with C-drive, a Windows Backup partition and D-drive. My C-drive was running out of space, so I asked the Hard Disk Manager to to three things:
1: Shrink the D-drive 20 GB from "the left"
2: Move the Windows Backup partition 20 GB to the right
3: Expand the C-drive 20 GB.

The system restarted and a lot of status messages made me feel everything was ok. Until I logged on to Windows.
My D-drive is vanished! If I try to access it, I just get at message: It must be formatted - it contains no recognizable file system. My C-drive has the same size as before. And everytime I start the Paragon app it shows me a pop-up:
CAdvLauncherViewModel. No control found: mainMenu
I have tried deleting the app and reinstall it, but it still fails!

And to top all: I did not make a backup of my D-drive.

So I really will appreciate any good suggestions about what to do now. Thank you.