Step 2: On the top Menu bar of the software interface, select Options .
Step 3: At the Options menu , select Settings .
Step 4: The Settings interface appears, select Integration .
Step 5: In the Associate WinRAR With section , uncheck the JAR box => OK .
So you can block WinRAR software from opening JAR files, now you can completely open JAR files with other software that supports opening JAR files. In addition, to increase the security of compressed files, you can refer to tips on how to password protect compressed files with WinRAR so that the use of WinRAR software is optimal and most effective.