Run the file to install the plugin to your system.
To use the contents of a .rar file, you must first extract it using specialized software: VST.rar
Right-click the .rar file and select "Extract" to reveal the actual plugin files. Identify the file type inside: Run the file to install the plugin to your system
Move these manually into your Digital Audio Workstation's (DAW) designated plugin folder. open-source options for Windows and Linux.
Tools like 7-Zip or PeaZip are free, open-source options for Windows and Linux.