1. Install Avira. (If already installed, then skip to step 2.)
2. Disable the AntiVir Guard. (Avira has identified this program as a threat [TR/Drop.MSIL.Agen.F].
3. Make sure that you are connected to the internet.
4. When you want to reset the trial period, just execute the TR and select [ RESET ].
5. To remove, just delete the file. There is nothing to uninstall.