Modern versions of Bulk Image Downloader (v4.x and above) do not rely on a simple offline registry key. When you enter a registration code, the software pings the official BID authentication servers. If that code has been used 5 times or is blacklisted, it is instantly rejected.

: An extremely powerful, open-source download manager. If you paste a URL into JDownloader, it will "crawl" the page and list every image available for download.

This is the gold standard for open-source downloading. It isn't just for images; it can grab entire galleries from almost any site, is completely free, and is regularly updated by a massive community.

A popular browser extension that allows you to scan and download all images on a page with one click.

Quick Steps to Download All Website Images To download all images on a webpage, enter the URL on the Image Extractor website and s... How to Bulk Download Images from URLs - Octoparse

It can explore nested URL structures to find hidden galleries that standard browser extensions cannot reach. How to Safely Bulk Download Images For Free

Searching for "free registration codes" or "cracks" on third-party sites is . These often contain malware, and BID's registration server automatically disables codes that are publicly shared or used across too many different PCs.

Most free codes you find online are either:

It features highly customizable filters (e.g., download only .jpg files larger than a certain size) and includes a download accelerator that splits files into multiple segments for faster speeds.

Many registration code generators come packed with Trojans. The hacker doesn't care about your image downloading habits; they want your banking logins. Once you run that .exe file for a "code generator," you may have just installed a remote access trojan (RAT).