Version Information

Updated Get-PlexToken function to support current Plex OAuth API including Two-Factor Authentication support
Incorporated support for -Plex2FA parameter for interactive execution
Added Exit codes based on results of script (See Exit codes)
Added -NotifySuccess parameter to provide a specific exit code (10) on successful installation of an update
More consistent and improved error handling
cleaned up parameter sets
Renamed -Quiet parameter to -Silent

Fixed Token Regex verification (added - and _)
Fixed logic for searching registry for InstallLocation and PlexOnlineToken that were causing issues on systems that have had both x86 and x64 builds installed previously
Improved Update Channel detection logic
Improved some error messages
Added additional logic to uninstall x64 build first before installing x86 build if present
Improved exit code matching specifically for x64 installer
Other various cleanups, fixes, & improvements

Added support for windows-x86_64 PMS build. Update-PlexMediaServer will continue to update the currently installed Build unless forced by Build parameter (i.g. -Build 'windows-x86_64')
Fix logic to detect active sessions for "in-use" check
Fix Invoke-WebRequest errors by adding UseBasicParsing parameter (Thanks SAS-1)
Added logic to retry checking Plex Web after process restart to allow for 30 seconds while web server is launching
Added Hostname parameter for plex web checks to bypass detecting public hostname using reverse IP lookup (helps for when running multiple PMS instances behind a single public IP)
Added ReportOnly parameter, script will report if update is required and exit
Add support for https url scheme when using custom port 443 -PlexServerPort 443
Other general improvements/fixes

Added -IncludeLog parameter for including log text in notification email (renamed EmailLog to AttachLog)
Added -EmailIsBodyHtml parameter to switch email to mobile friendly HTML format
Improved notification logic and general logging content
Added support for #Slack notifications with -SlackNotify parameter (Slack OAuth token required)

Corrected some error handling when PMS exe was not detected
Added -UpdateCleanup parameter and logic to remove old updates from updates folder
Improved error capture for Send-ToEmail function to return exception with passthru v2.0.0 2017.10.31 (Updates by m1lkman)
Significant updates to validate and download the latest version from Plex.tv (Public or PlexPass/Beta)
Supports authenticating against Plex.tv and local server using Plex.tv credentials or Tokens
Default execution leverages PMS Server Online Authentication token, honors Update Channel setting.
Added logic to validate checksum on downloaded updates
Updated logic to pull PMS user context from Plex Media Server.exe process
"In-Use Check" will exit when active Sessions are detected on Plex Media Server
Validates PMS process and Plex Web availability after update
Added Email notification function
Added Get-PlexToken function for fetching Plex authentication token via command-line
Added -force option to force install of PMS even when version isn't newer.

Corrected Logic for UserName bringing back some original code from eansconforti
New loop to execute update exe and monitor while running with logic for exitcode
Switched to $env:SystemDrive to build AppDataPath

Verify EXE exists before continuing.
Changed the 'Last 1' to 'First 1' in the EXE sort to return the newest executable.
Simplified User SID logic so it works for Local accounts and domain accounts.
Logic to pull non-default local app path if configured then default to AppData

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