This is a prime sign, that the script you are using, is slowly eating more Memory, each time it is run.
This could be, that each time you right click, the script adds a new variable, or even in one of the aliases run, after clicking an item in the popup.
Hash tables, variables and network sockets can all be a cause.
An example. Downloading a file, into variables or hash tables, using a socket, and forgetting to cleanup the data afterwards. Simply doing this multiple times, would eat the memory.
