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1. Download the Software
- Visit the KeyExpress Download Center, follow the link in your invoice.
- Click to download the installer file for Windows or Mac.
2. Installation Process
For Windows
- Open the downloaded installer file (
.exe).
- If Windows asks for permission, click Yes.
- Follow the setup wizard instructions.
- Choose the installation location if needed.
- Click Install.
- Wait for the installation to complete.
- Click Finish to launch Bigasoft Total Video Converter.
For Mac
- Open the downloaded
.dmg file.
- Drag Bigasoft Total Video Converter into the Applications folder.
- Open the application from Applications.
- If macOS security prompts appear:
- Go to System Settings → Privacy & Security
- Allow the application to open.
- Launch the software.
3. Activation / Registration Process
- Open Bigasoft Total Video Converter.
- Click Register from the software interface.
- Enter:
- Your licensed email address
- Your registration code/license key
- Click Register to activate the full version.