I installed Sandboxie to look into the issue you are experiencing. I'm using Windows 7X64. I made the following two Sandboxie executables Power Apps as shown in the screen shot below. The organize button is working fine for me in Medium Protection Mode. It expands just fine when Sandboxed. I forgot to check it in Locked Down Mode, but I will as soon as I close my browser. I'm using Firefox Sandboxed with Sandboxie to make this post. It's been a while since I have used Sandboxie so I could do more testing to see if I discover any problems. Many users here use Sandboxie, and AppGuard together so they will work fine when configured correctly.