Report required confirming time and date stamp can be modified on software program

I have a complaint against my solicitor where she dealt in a conflict of interest . The solicitor has months later provided digital case file notes saying she advised me of the risk of conflict in 2017 ( a complete lie) she has been using a downloadable software management program called https://www.lawprolegal.co.uk/case-management-software

I understand if you modify the date of your computer any software program will revert to the date you have tricked your computer into thinking it is.

I need a report from a forensic it guy confirming it is possible