Hi,

Here is my setup. Umbaco 4.7.1 with CampaignLetter 0.3.3 on windows 7 64bit.

I get the following error whilst trying to install this package.

Server Error in '/' Application.

Error running NonQuery: 
SQL Statement:
IF NOT EXISTS(SELECT [user] FROM umbracoUser2app WHERE [user] = 0 AND app = 'campaignletters')                                          INSERT INTO umbracoUser2app([user],app) VALUES(0, 'campaignletters')

Exception:
System.Data.SqlServerCe.SqlCeException (0x80004005): There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = IF ]
  at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
  at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
  at SqlCE4Umbraco.SqlCeApplicationBlock.ExecuteNonQuery(String connectionString, CommandType commandType, String commandText, SqlCeParameter[] commandParameters)

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: SqlCE4Umbraco.SqlCeProviderException: Error running NonQuery: 
SQL Statement:
IF NOT EXISTS(SELECT [user] FROM umbracoUser2app WHERE [user] = 0 AND app = 'campaignletters')                                          INSERT INTO umbracoUser2app([user],app) VALUES(0, 'campaignletters')

Exception:
System.Data.SqlServerCe.SqlCeException (0x80004005): There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = IF ]
  at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
  at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
  at SqlCE4Umbraco.SqlCeApplicationBlock.ExecuteNonQuery(String connectionString, CommandType commandType, String commandText, SqlCeParameter[] commandParameters)

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[SqlCeProviderException: Error running NonQuery: 
SQL Statement:
IF NOT EXISTS(SELECT [user] FROM umbracoUser2app WHERE [user] = 0 AND app = 'campaignletters')                                          INSERT INTO umbracoUser2app([user],app) VALUES(0, 'campaignletters')

Exception:
System.Data.SqlServerCe.SqlCeException (0x80004005): There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = IF ]
   at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
   at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
   at SqlCE4Umbraco.SqlCeApplicationBlock.ExecuteNonQuery(String connectionString, CommandType commandType, String commandText, SqlCeParameter[] commandParameters)]
   SqlCE4Umbraco.SqlCeApplicationBlock.ExecuteNonQuery(String connectionString, CommandType commandType, String commandText, SqlCeParameter[] commandParameters) +854
   umbraco.DataLayer.SqlHelper`1.ExecuteNonQuery(String commandText, IParameter[] parameters) +150

[SqlHelperException: Umbraco Exception (DataLayer): SQL helper exception in ExecuteNonQuery]
   umbraco.DataLayer.SqlHelper`1.ExecuteNonQuery(String commandText, IParameter[] parameters) +261
   uWebZone.CampaignLetters.UserControls.Installer.Page_Load(Object sender, EventArgs e) +197
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Control.LoadRecursive() +190
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3064

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.237