clarify some exception messages

Author: tomysshadow

FlashpointSecurePlayer/EnvironmentVariables.cs

@@ -143,7 +143,7 @@ private string GetValue(EnvironmentVariablesElement environmentVariablesElement)
 
                         if (comparableName != null) {
                             if (UnmodifiableComparableNames.Contains(comparableName, StringComparer.OrdinalIgnoreCase)) {
-                                throw new InvalidEnvironmentVariablesException("The \"" + environmentVariablesElement.Name + "\" Environment Variable cannot be modified while creating the Active Environment Variables Element.");
+                                throw new InvalidEnvironmentVariablesException("The \"" + environmentVariablesElement.Name + "\" Environment Variable could not be modified while creating the Active Environment Variables Element.");
                             }
                         }
 
@@ -179,7 +179,7 @@ private string GetValue(EnvironmentVariablesElement environmentVariablesElement)
 
                         if (comparableName != null) {
                             if (UnmodifiableComparableNames.Contains(comparableName, StringComparer.OrdinalIgnoreCase)) {
-                                throw new InvalidEnvironmentVariablesException("The \"" + environmentVariablesElement.Name + "\" Environment Variable cannot be modified at this time.");
+                                throw new InvalidEnvironmentVariablesException("The \"" + environmentVariablesElement.Name + "\" Environment Variable could not be modified at this time.");
                             }
                         }
 
@@ -310,7 +310,7 @@ public void Deactivate(MODIFICATIONS_REVERT_METHOD modificationsRevertMethod = M
 
                             if (comparableName != null) {
                                 if (UnmodifiableComparableNames.Contains(comparableName, StringComparer.OrdinalIgnoreCase)) {
-                                    throw new InvalidEnvironmentVariablesException("The \"" + activeEnvironmentVariablesElement.Name + "\" Environment Variable cannot be modified at this time.");
+                                    throw new InvalidEnvironmentVariablesException("The \"" + activeEnvironmentVariablesElement.Name + "\" Environment Variable could not be modified at this time.");
                                 }
                             }
 

FlashpointSecurePlayer/FlashpointSecurePlayerGUI.cs

@@ -70,7 +70,7 @@ public FlashpointSecurePlayerGUI() {
                     // multiple instances open, blow up immediately
                     applicationMutex.Close();
                     applicationMutex = null;
-                    throw new InvalidOperationException("You cannot run multiple instances of Flashpoint Secure Player.");
+                    throw new InvalidOperationException("You must not run multiple instances of Flashpoint Secure Player.");
                 }
             } catch (InvalidOperationException ex) {
                 LogExceptionToLauncher(ex);

FlashpointSecurePlayer/Properties/Resources.Designer.cs

@@ -218,13 +218,13 @@ If you choose No, the application will exit.</value>
     <value>The process is unable to start.</value>
   </data>
   <data name="RegistryStateAlreadyInProgress" xml:space="preserve">
-    <value>The Registry State cannot be started because another one has already been started.</value>
+    <value>The Registry State could not be started because another one has already been started.</value>
   </data>
   <data name="RegistryStateInProgress" xml:space="preserve">
     <value>The Registry State is being created. Please do not turn off your computer.</value>
   </data>
   <data name="RegistryStateNotInProgress" xml:space="preserve">
-    <value>The Registry State cannot be stopped because no Registry State has been started.</value>
+    <value>The Registry State could not be stopped because no Registry State has been started.</value>
   </data>
   <data name="RegistryStateTimeout" xml:space="preserve">
     <value>The Registry State timed out.</value>

FlashpointSecurePlayer/Properties/Resources.resx

@@ -275,7 +275,7 @@ There are four possible scenarios.
 
 In scenarios one and two, Flashpoint Secure Player reverts the active Registry States Modification because the software is no longer open. In scenario three, Flashpoint Secure Player reverts the active Registry States Modification and any software opened using Software Mode is killed. In scenario four, Flashpoint Secure Player will revert the active Registry States Modification whenever the application is next run, regardless of what Modes or Modifications are specified.
 
-If the Registry States Modification cannot be reverted, an error occurs and the application will exit, and not do anything else regardless of what Modes or Modifications are specified until the issue is resolved. If the registry has been modified by a different application outside of Flashpoint Secure Player, the player no longer assumes control of those registry keys and values, and the active Registry States Modification is silently discarded.
+If the Registry States Modification could not be reverted, an error occurs and the application will exit, and not do anything else regardless of what Modes or Modifications are specified until the issue is resolved. If the registry has been modified by a different application outside of Flashpoint Secure Player, the player no longer assumes control of those registry keys and values, and the active Registry States Modification is silently discarded.
 
 **Administrator User**