DrServer daily builds
You can get the latest version of the DrServer.exe application in the daily builds repository on Dropbox.
It is located in the "DR SERVER" folder with the most recent date. Simply replace the old .exe file with the new one. If you cannot see DrServer in that folder, it simply means that the one available in the official installer is the most recent one.
Using Daily Builds of Corona may also help solve some of the DR-related problems.
See: Daily Builds