Fresh new Kobo image (it was a mess). So let's see what's new. And I stumble in your post and this PS script. Downloaded Koreader+Plato, run the PS script....
Looks nice but somethings failing after uncompress and fixing Nickel scanning hidden dirs. Then thousand of errors from PS trying to remove inexistant files. Then installation successful....
(not)
Apart from not being able to understand what is really failing in the install process, I could do a manual install. But I guess it would be better to report this in order to help other people with same problem.
I'm on Windows 10 with PS 5.1 what possible can go wrong, right?
Remove-Item : Cannot find path 'D:\.adds\koreader\libs\libzyre.so.1' because it does not exist.
At C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules \Microsoft.PowerShell.Archive\Microsoft.PowerShell .Archive.psm1:411 char:46
+ ... $expandedItems | % { Remove-Item $_ -Force -Recurse }
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (D:\.adds\koreader\libs\libzyre.so.1:String) [Remove-Item], ItemNotFoundException
+ FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.RemoveI temCommand
Exception calling "ExtractToFile" with "3" argument(s): "Block length does not match with its complement."
At C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules \Microsoft.PowerShell.Archive\Microsoft.PowerShell .Archive.psm1:1056 char:25
+ ... [System.IO.Compression.ZipFileExtensions]::ExtractToFile( ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~
+ CategoryInfo : NotSpecified: (
[], MethodInvocationException
+ FullyQualifiedErrorId : InvalidDataException
* Installation successful!
* Please make sure to unplug your device safely!
Press Enter to exit: