During deinstallation, Recuva deleted ALL *.txt files which I had in the root folder of my D:\ drive!
Thank god I had a backup, but WTF, are you testing your software? This bug is replicable. I copied some random .txt files to D:, installed and deinstalled Recuva again and the installer even lists all the deleted files. This is really a no-go. Especially for a recovery software (which was btw after reinstallation not able to recover the files which the installer just deleted).
Proof of Bug attached.
EDIT: I used the free version of Recuva.