I am new to Qualtrics and Java, never used either. 

I have a matrix question with several rows of options and a last row for ‘others’ where participants can add their answers and select an option on the respective Likert scale. The problem is that if you mistakenly click on any of the Likert scale options for ‘others’, it won’t let you uncheck and you are forced to write something in the text box for ‘others’. I would like participants to be able to unselect their options for the last row only.

I can see that there are some solutions provided for it by the community but being completely unfamiliar with Java, I am not able to get my head around how to proceed with adding a deselect button, where to put the Java code or how to find the question ID etc. 

Can someone please be kind enough to explain in a more step-by-step way?