[BUG] Free version can pin unlimited domains

[kics223w1]

Description

• In the Free version, users can pin unlimited domains but in Mac user only can pin 4 domains

Steps to Reproduce

1. Start the application, intercept domains
2. Pin domains
3. User can pin over 4 domains when user uses Free version

Current Behavior

• Pin unlimited domains in Free version

Expected Behavior

• Only pin 4 domains in Free version
• Pin unlimited domains in Pro version

Environment

• App version: 2.17.0