If JNLP files wont open with Java web launcher and you have tried the standard file association steps then try using a standalone app. 'Default Programs editor' https://defaultprogramseditor.com/ you do not need to elevate or install this application (its stand alone) and it needs to be run in the users profile with the problem.



A screenshot of a computerAI-generated content may be incorrect.                                         A screenshot of a computerAI-generated content may be incorrect.

 1. Click File Type Settings                                                                                 2. Click Context menu

 

A screenshot of a computer programAI-generated content may be incorrect.                                       A screenshot of a computerAI-generated content may be incorrect.

 3. Type jnlp, click Next                                                                                      4. Click Edit selected Command

                                                                                     

A screenshot of a programAI-generated content may be incorrect.                                           A screenshot of a programAI-generated content may be incorrect.

 5. Click Browse Navigate to the current Java version                                         6. Click Save Context Menu, Click OK

 C:\Program Files (x86)\Java\jre1.8.0_4*1\bin\javaws.exe

 Click Next

 

7. Close the application

8. Test opening a JNLP file