The dll file is based on the code of v1.0.0.20. 

Steps:

1. Please replace the UpdateProgram.dll in the installation destination directory with this one. Also, please replace the file "Barbie Doll'd Up Nails.exe.config".
2. Please change the "update_host" value to the test server. The value should only be the URL as the application will append the Version and PID parameters when it sends the update request.

After that, you can test the downloading from a test server.