Step 1: Google Hascalc, download it and install it.
Step 2: Clear password and salt in your MYSQL account.
Step 3: Open Hascalc and tick SHA1.
Step 4: Data Format: Text String
Text Data: [What you want your password to be]
Step 5: Click calculate.
Step 6: Copy your SHA1 code in the column of SHA1.
Step 7: Paste it in MYSQL.
Step 8: Press apply changes.
Step 9: If MYSQL wants you to type something in a column, type 1 or 123.