You can learn from this article how to change your host computer.

1. From the host computer you'd like to access remotely, log in at https://www.GoToMyPC.com/members/login.tmpl.
2. Select My Computers in the left toolbar.
3. Select Add Computer and Install GoToMyPC.
4. Download or Run gosetup.exe to launch the GoToMyPC Installer window.
5. Select Next.
6. Choose Yes, restart this computer now or No, I'll restart this computer later, and select Next.
7. Enter your GoToMyPC account email address and account password, and select Next.
8. Enter a nickname for your computer (this can be the same as the prior computer).
9. If you are a GoToMyPC Corporate user, select the account you'd like to register this host computer to.
10. Enter your new access code twice, and select Next.
11. Select Finish.
12. You've successfully installed the host computer! Test your connection with your client computer or mobile device.