Unable to undo changes in Xodo PDF Reader

Registration date
Friday October 13, 2017
Last seen
August 5, 2022
- Aug 5, 2022 at 06:08 AM

I want to undo certain changes I have unknowingly saved in Xodo PDF reader.

I had highlighted a word in a PDF document that I was reading through Xodo.

Absent-mindedly, I had clicked on annotate and I found that two lines, one red and one black were drawn across that word. 

 I should have clicked on the curved arrow above for undo. I did not and it got saved.

Now, try as much as I want, I am unable to remove those two lines from that text.

How should I unsave this when it is already saved? 

Could anyone help?