Version 91.2 does not support the newest router models. Manufacturers have largely patched the default PIN generation flaw. For routers manufactured after 2018, Dumpper is mostly ineffective.
For those interested in testing their own network's security, you can find the software hosted on platforms like SourceForge . Download Dumpper v.91.2.rar (Dumpper) - SourceForge Dumpper V.91.2
If a tool like Dumpper V.91.2 can easily identify or access your network, your wireless security is outdated. Protect your router by taking the following defensive steps: Version 91