Also, do not trust Windows search as it's notoriously inaccurate. Try this instead:

Start Command Prompt on your Windows machine where you had backup.

Type commands:

c:
cd \
dir /s *.obk
dir /s *.dab

This will take a long, long time but if there's a backup or a remaining database anywhere it will find it.

(if you have more than c: drive, repeat same for each drive: d:, e: etc.)