Open, Save As, Import, Export, Publish To PDF not working on Coreldraw X7 and Coreldraw 2018

Since last months in both versions Open, Save As, Import, Export, Publish To PDF command are not working.

When I restart CorelDraw it's works for once. After opened one file can't able to open.

All options where need to open windows explorer are not working.

I have tried following repairs.

1. Uninstall and reinstall. (Same position after 1 or 2 days)

2. Uninstall with Revo Uninstaller. (Same position after 1 or 2 days)

3. Renaming corel folder in user folder. (Same position after 1 or 2 days)