.exe stands for executable! It's the format windows uses for apps. It's smart to have some level of caution when downloading and using .exe files but I can promise that desktop tenna is safe :)
Omg, thank you soo much, me and my bestie are so grateful. My friend and I were wondering if it was a virus and she'll be happy to know that it's not, I'll be downloading it and texting her that it's okay. Thank you for your help :D