THE PROJECT FILE IS CORRUPTED IN ADOBE RUSH

Hello Adobe, I am sorry to say that I'm dissapointed that today my project file is corrupted. It actually already happened for twice in a row. The first one, the project can be saved since the task gave me the warning not to close the Adobe Rush for it'd be un-saved. Then I rendered it instead of saving. And it worked. The rendering process was done successfully. . But when I re-open the project again, indeed that it's not saved and the files were lost. 
For the second one, when I did my project in adobe rush, while the internet was off today, then I tried to save it locally, there was no any task of warning at all.  I thought it was okay. But when I wanted to re-open it, it's failed, again and again. It can't be opened, at all. It's corrupted, the whole files, my project having been done for hours. 15 hours of work, to be exactly. Honestly I'm so dissapointed. I wish that the adobe rush team will fix this error. I do love editing with adobe rush instead of the other softwares because frankly speaking the adobe rush is friendly to use, easy to adapt. But why it is also easy to be error? That's why I do really hope that the team can fix it, can make it better. 
Ok I think that's all the problem that I go through so far. And I will be glad if the team will consider this trouble. 
Thank you,