How to cancel the file password
1. Use WPS Office to open the encrypted file.
2. Input the password in the pop-up box to enter the file.
3. Click Menu in the top left corner → Options → Security.
4. In the Password protect box, delete all the passwords that have been set.
5. Click OK button.
To be office word advanced, you could learn how to use WPS Office Writer online in WPS Academy.