Confirm the DLL files are not trapped inside a subfolder (e.g., C:\DSDPlus\dll_pack\ ). They must be loose in the main C:\DSDPlus directory.

Often, the "download fix" isn't about the download at all—it’s about the user’s expectation. A freshly downloaded DSD+ 2.71 folder is not plug-and-play. Users frequently report that the program "does nothing" or crashes immediately. This is not a broken download but a missing configuration. The fix requires three critical steps. First, you must install the necessary VB-Cable Virtual Audio Cable to route audio from your SDR software (like SDR# or SDRTrunk) into DSD+. Second, the FMP24-CC.bat and 1R.bat batch files must be edited with a text editor to match your specific SDR dongle’s serial number and the correct trunking frequencies. Third, the user must ensure the correct Microsoft Visual C++ Redistributables (specifically the 2015-2022 package) are installed, as DSD+ 2.71 is compiled with modern Windows libraries. Without these environmental fixes, even a perfect download will result in non-functional software.

The application relies on specific, often dated, Windows DLL files (e.g., libfftw3f-3.dll , pthreadVC2.dll ).

To help narrow down any remaining configuration issues, tell me: What are you pairing with DSDPlus?

: Toggles audio input inversion (crucial for swapping between positive and negative waveforms).

| Symptom | Likely fix | |---------|-------------| | Corrupt ZIP | Redownload, use 7-Zip | | Missing MSVCR120.dll | Install VC++ 2013 x86 | | Antivirus deleted .exe | Restore + folder exclusion | | No audio decode | Check virtual audio cable routing | | Key invalid | Re-register, check system date | | SDR not found | Run Zadig, use -i flag |

Ensure the folder does not have "Read Only" permissions and that you are running the program with administrative privileges if necessary. 3. Bypass Download Failures (Manual Update)

Save the file as launch.bat (make sure the extension is .bat , not .txt ).

Which (e.g., RTL-SDR v3/v4, HackRF, Airspy) are you using?

If you are using SDRPlay, I can specifically help with updating the msvcr90.dll or other base files. DSDPlus 2.268 RSP1A Issue - RadioReference.com Forums

Select to find the blocked DSDPlus zip file. Click Actions and choose Allow on device . Create an Exclusion Folder

If DSD+ appears to be working but is failing to identify the signal you are listening to, consider these points: