It could be that changing it and then coming back may have caused something to break although it looks like the issue with your website is mostly CSS related (it’s the articles spilling over wide on the lower part of the page right?).
the item was updated in Jan 2019 so if you are using a version older than that then you probably wat to update it (download the latest copy from your downloads page on themeforest)
Beyond that without spending some time looking into it then it’s hard to advise on what may be causing the issue, however over 6 months there is no obligation for the author to assist
you coud probably find a freelancer on www.studio.envato.com to put things right otherwise