How to Set Windows File Associations to Open .JNLP Files Issue: No default app to open frmservlet.jnlp Solution: Open Control Panel from the Start option. Go to Programs and select Default Programs. Click on ‘Associate a file type or protocol with a program’. From the list of extensions, select JNLP. Select Change Program. If the proper Java application doesn’t show automatically, then choose the More Apps option. Now look for another app on this PC. Go to the Program Files (x86) folder. Click on the Java folder. Open the latest version of JRE you have. Go to the bin folder. Double-click on the javaws.exe application.
