Hi and thanks for trying it out.
I am Sorry but recognition of already installed libraries is not possible.
This is because i know of no way to clearly identify the installed libraries.
Maybe i will try to download all available libs from the list and analyze the zipped files with the folders that are already inside the Arduino folder.
But then the application will need to download first every available library to check them.
might be too much when there will be more libraries in the list.
If someone have a better idea just let me know.
Can you just install the lib from the list that you already have? then it will be marked in the application.
Next on my list for the next feature is to implement the filter/search inside the Application.