I had the same problem as you (I had Tesseract 3.0.2 installed as well).
I had to uninstall it (didn't help by itself) and then remove the installation directory ("C:\Program Files (x86)\Tesseract...")
and finally search the Windows registry (regedit.exe) for any leftover 'tesseract' entries (I zapped them all) and then reboot
We're working on overhauling this OCR functionality for the Wolfram Language, so I expect that a future version will not have this software compatibility conflict.
Let me know if this helps you (or not)!