Long, struggled download process

I dont know if anyone else struggled with the download process but myn is a living hell. Its been downloading for 3 and a 1/2 days now and it still wont fully download,and Ive tried deleting it but it is in the process of installing so it wont let me delete it. So if anyone else is having this problem please let me know. And if anyone knows how to solve it please let me know.

Tickaling about Reverse Cam, v2.0