1.6.0.0
Updated all the files names read from sirenmastery/vehicles to match the new OpenIV string names.
This should prevent all the current crashing issues.
Please ensure that you re-export your vehicles.awc as per the installation instructions to avoid any issues as the old siren hash file names are no longer valid.
Updated for Albo1125.Common 6.6.0.0.
Updated for the new RPH, should work with 0.51 or higher.

1.5.0.0:
Fixed crash upon getting into police vehicles with certain ELS configurations.

1.4.3.0:
Updated for RPH 0.51 and GTAV 1.0.1011.1 (minimum now).
Updated for Albo1125.Common 6.4.1.0.
Updated NAudio.dll to 1.8.0.0.
Added a Previous Siren function.
Added an option to disable additional foreground checks for Siren Mastery - this seemed to be causing crashes for people.
Added automatic detection of active ELS vehicles.
Added an option to disable Siren Mastery when in an active ELS vehicle (with a VCF).
Updated documentation for instructions on how to use Siren Mastery with ELS.
Updated Table of Default Controls.

HOW TO UPDATE YOUR CONFIG INI FILES IF UPGRADING FROM VERSION 1.4.0.1:
GeneralConfig.ini: Copy Paste the following to the bottom of your INI:

//Setting this to true disables Siren Mastery functionality for vehicles that have an ELS VCF file.
DisableForELSVehicles=true

//Setting this to true ensures sirens are always automatically muted when switching to a different application on your computer, but can be buggy and lead to crashes.
//I recommend setting this to false, and to pause the game/mute your siren before alt tabbing out if you don't want to hear it.
EnableAppForegroundChecks=false

KeyboardConfig.ini: Copy Paste the following to the bottom of your INI:
//Default: PreviousSirenKey=J
PreviousSirenKey=J

//Default: PreviousSirenModifierKey=Alt
PreviousSirenModifierKey=Alt

ControllerConfig.ini: Copy Paste the following to the bottom of your INI:
//Default: PreviousSirenButton=None
PreviousSirenButton=None

//Default: PreviousSirenModifierButton=None
PreviousSirenModifierButton=None