The most reliable way to download is through the official DSDPlus.com website.
Go to dsdplus.com , click the “Fast Lane” information link, and donate. For roughly the cost of a pizza, you get the latest version (which includes all the features of 2.71 and many more), direct support, and clean code free of viruses. dsdplus 2.71 download
A search for "2.71" suggests a typo (confusing it with the current Fast Lane version numbers) or confusion with the "Fast Lane" subscription model. This report details the software’s current status, where to safely obtain it, and the critical distinction between Public and Fast Lane versions. DSDPlus 2
dsdplus.com.