Retrives the latest download of KeePassRPC from Github, and loads it into the KeePassRPC folder in the C:\ drive

Update-KeePassRPC.ps1

function promptYesNo ($title, $question) {
    $choices = '&Yes', '&No'
    $decision = $Host.UI.PromptForChoice($title, $question, $choices, 1)
    $decision -eq 0
}

function Convert-GithubVersion($githubVersionString) {
    [System.Version]$githubVersionString.Substring(1)
}

function Test-IsAdmin {
    try {
        $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
        $principal = New-Object Security.Principal.WindowsPrincipal -ArgumentList $identity
        return $principal.IsInRole( [Security.Principal.WindowsBuiltInRole]::Administrator )
    }
    catch {
        throw "Failed to determine if the current user has elevated privileges. The error was: '{0}'." -f $_
    }

    <#
        .SYNOPSIS
            Checks if the current Powershell instance is running with elevated privileges or not.
        .EXAMPLE
            PS C:\> Test-IsAdmin
        .OUTPUTS
            System.Boolean
                True if the current Powershell is elevated, false if not.
    #>
}

function Update-KeepassRPC {
    # Constants, change if needed
    $keepassRPCLocation = "C:/Program Files (x86)/KeePass Password Safe 2/Plugins/"
    $downloadFolder = "~/Downloads/"
    $filename = "KeePassRPC.plgx"
    $versionFileName = "keepassRPC-version.txt"
    $keepassRPCGithubURL = "https://api.github.com/repos/kee-org/keepassrpc/releases"
    # Check running as admin
    if (!(Test-IsAdmin)) {
        Write-Host "Oops! Please run this script as administrator."
        return
    }
    # Access the Github API
    $resp = Invoke-RestMethod -Uri $keepassRPCGithubURL
    # Check for a version bump
    $version = Convert-GithubVersion($resp[0].tag_name)
    $oldVersion = [System.Version](Get-Content ($downloadFolder + $versionFileName))
    if ($version -le $oldVersion) {
        Write-Host "Current version is $oldVersion, no need to update"
        return
    }
    # Download the latest file to ~/Downloads
    Write-Host "Updating $oldVersion --> $version"
    Write-Host "--------- Release notes --------"
    Write-Host $resp[0].body
    Write-Host "--------------------------------"
    $url = $resp[0].assets.browser_download_url
    Invoke-WebRequest -Uri $url -OutFile ($downloadFolder + $filename)
    # Check for closure of KeePass
    if (!(promptYesNo("Keepass Closure Confirmation", "Are you running as admin? Have you closed KeePass?"))) {
        Write-Host "Please close KeePass and try again. Exiting."
        return
    }
    # Backup the files
    Move-Item -Path ($keepassRPCLocation + $filename) -Destination ($keepassRPCLocation + "KeePassRPC(1).plgx") -Force
    Copy-Item -Path ($downloadFolder + $filename) -Destination ($keepassRPCLocation + $filename)
    # Record the updated version to file
    [string]$version | Out-File ($downloadFolder + $versionFileName)

    <#
        .SYNOPSIS
            Updates KeePassRPC, a plugin for KeePass
        .EXAMPLE
            PS C:\> Update-KeePassRPC
    #>
}

Usage: Put this into your powershell profile, and run the function by typing Update-KeePassRPC