I can't see my project

Hi
Today I couldn't open "Nicepage" on my desktop (I purchased it on early December 2020) so that I had to connect to my online account with you and re-install the new version of the software on my desktop, after downloading now I can't open my project (it's very disappointing screen shot attached) that I was working on it for more than a month, could you please let me know how can I bring my project back again (all files are saved on my hard drive) as I have just few day to deliver my project to my manager.