The downloaded file "rastail_ver_xxxx.zip" (xxxx is the version number of the software) has the actual software compressed, so double-click to unzip the file and copy it to the appropriate folder. It does not write to the registry.
Overwrite all files if an earlier version exists. (However, only for upgrades.) Do not overwrite by downgrading.)
Delete the entire unzipped folder. However, please note that the data you create may be deleted.
Starting with Rastil Ver 3.0, you may want to create files in the following folders, for example, with write permissions in place: If you want to delete all data, please delete the following folders.
|Windows Vista, 7, 8||C:\Users[username]\AppData\Roaming\SorceryForce\Rastail
|Windows XP||C:\Documents and Settings[username]\Application Data\SorceryForce\Rastail
C:\Documents and Settings[username]\My Documents\SorceryForce\Rastail