Path Environment Variable
On Windows the PATH variable is a very special variable. It is specified as a number of directories separated by semicolon. When a command has been started from the command line, the command processor searches the current directory, then examines each directory from the PATH variable. One the executable is found the command processor starts it.
How to edit PATH variable
From the RapidEE's point of view the PATH variable doesn't differ from the other variables. So you can use it the same way as you do with another environment variables. RapidEE may be used to edit "System Variables" which will affect all users or "User Variables" which will affect just the current one:
Note, that RapidEE highlights the wrong path. You can either fix it or delete wrong item to keep your system clean and a bit faster.