Running the Install.ps1 script leads to this error. I tried with both updating Files and doing a clean install

You might need to wait for the store version to be released if the sideload package isn't working.
Oh? So the VS bug that prevented you to compile Store builds is gone, I guess
The bug is still there, but we have been able to find a temporary workaround.
Seeing the same issue here.

It might help to restart Windows, and try sideloading again.
Thanks for the suggestion – I did try that and received the same error. For now have installed the 0.7.0 Microsoft Store version waiting on the update to come once it is available.
Thanks.
Rich
From: Yair Aichenbaum notifications@github.com
Sent: Wednesday, March 11, 2020 12:16 PM
To: duke7553/files-uwp files-uwp@noreply.github.com
Cc: Richard Hay richardhayjr@hotmail.com; Comment comment@noreply.github.com
Subject: Re: [duke7553/files-uwp] Error when trying to install 7.1.0 (#452)
It might help to restart your computer and try sideloading again.
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Sorry about the inconvenience with the sideload package. The store update is still in certification and will be released as soon as it is done.
could be its the wrong file in the zip, as it says arm_arm64. may just need updating.
Appreciate the update. Just grabbed Quick Pad to work with in the meantime.
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From: Yair Aichenbaum notifications@github.com
Sent: Wednesday, March 11, 2020 1:03:23 PM
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Subject: Re: [duke7553/files-uwp] Error when trying to install 7.1.0 (#452)
Sorry about the inconvenience with the sideload package. The store update is still finishing certification and will be out as soon as that is done.
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v0.7.1 is now available on the Microsoft Store.
Superb – downloaded, installed and working!
From: Yair Aichenbaum notifications@github.com
Sent: Thursday, March 12, 2020 10:21 AM
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Subject: Re: [duke7553/files-uwp] Error when trying to install 7.1.0 (#452)
v0.7.1 is no available on the Microsoft Store.
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Most helpful comment
Superb – downloaded, installed and working!
From: Yair Aichenbaum notifications@github.com
Sent: Thursday, March 12, 2020 10:21 AM
To: duke7553/files-uwp files-uwp@noreply.github.com
Cc: Richard Hay richardhayjr@hotmail.com; Comment comment@noreply.github.com
Subject: Re: [duke7553/files-uwp] Error when trying to install 7.1.0 (#452)
v0.7.1 is no available on the Microsoft Store.
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