Batch file hangs up...

I have created this btm file to run some programs but it hangs up after running Brave. The btm file does not terminate no matter how long I wait. If I terminate Brave it will go ahead and run Thunderbird but hangs up again indefinitely. To get the btm file to end I have to terminate Thunderbird. Here is the btm file:
@echo off
"C:\Program Files\Easy Context Menu\Files\nircmd\nircmd_x86.exe" mutesysvolume 1
"C:\Program Files\zabkat\xplorer2_lite\xplorer2_lite.exe" /M
"C:\Program...

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