Hello dear Sophia! Thank you for coming back to me! Shortly after I posted my question I located the folder where Indicators are stored! I am thanking you nevertheless!
Maybe you can even help me to solve my main issue:
I downloaded & successfully converted the i-Regr Indicator along with its code as you can see here:
....and I got the following error message:
Can you kindly be of help?
Thank you in advance for your trouble!