Actually, you can just type/paste the full install path in the address bar of File Explorer and it will show the files with no complaints, no need to turn on show hidden files, not that this will be that useful to you. What you can't do is double click and enter the WindowsApp folder without Windows complaining about it. You can get the install path by opening a Windows Powershell and entering 'Get-AppxPackage -Name *AffinityDesigner*', without the quotes. Change Designer to Photo or Publisher for those Apps. There is a huge amount of misconception on this forum about what msix actually is.