The program is stopped, I can't do no function

I’m just beginner in Audacity. I tried to use this program some years ago, but now I need to use it seriously for creating the film.
I tried to work with this program. After I did some actions, I got the program frozen or stopped, because I can’t to any action like cutting or doing a copy and other. The buttons is translucent and unlighted. The most strange and awful is that I can’t to save the project or export the file.
So, I don’t know what should I do. I’m afraid to restart the program or the computer because I want to save my work.
Help me, please, because now I have to keep Audacity opened while I don’t solve my problem.
What can you suggest me? I remember that I have already got this problem some years ago and I think that I didn’t solve this problem earlier and I just did the restart with wasting my work and time.
Снимок экрана 2018-10-14 в 11.25.59.jpg
Снимок экрана 2018-10-14 в 11.26.03.jpg

You are in Pause mode. Click the Stop button.
Also, upgrade to the latest version. It leaves menus enabled in Pause mode and automatically goes into Stop mode if you try to do something.

– Bill