For WP Masonry Lite Version
- Download the plugin zip file from here
- Upload the plugin files from Plugin > Add New > Upload from WordPress Admin Panel
- Activate It
- You can also search Wp Masony Layout from Plugin > Add New > Search and install it directly from WordPress Repository.
For WP Masonry Pro Version
- Download the plugin zip file from here
- Upload the plugin files from Plugin > Add New > Upload from WordPress Admin Panel
- Activate It
- Please make sure to deactivate and delete the lite version before using Pro Version.
Reference : If you are new to wordpress plugin installation, please refer to this detailed documentation.