I am having the same problem. I just received and installed the DSDplus Fastlane zipfile. I unzipped to my existing DSDplus folder. Then per the instructions in the readme file I attempted to download the DLL file at:
https://www.dsdplus.com/dsdplusuploads/FastLane/libfftw3f-3.dll This produces a blank page. I tried: Firefox and Edge with the same result. I understand that it takes you to DLL-FILES.COM so I went there and searched for the file and downloaded it, and placed it into the DSDplus folder. Now the program produces an error stating the checksom of the DLL has failed. I just emailed 'DSDPlus Information Minister' <
dsdplusinformationminister@gmail.com>. And I'm waiting for a reply. Does anyone have a concise solution? I've read the previous comments and they were not helpful. If I'm not confused, my goal is to aquire both the libfftw3_3.dll & Lame_enc.dll . Thanks to all.