diff --git a/.gitignore b/.gitignore
index 0fde7df..b2219d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,6 @@ bin/
 obj/
 *.user
 .vs/
-packages/
\ No newline at end of file
+packages/
+/install/output
+/AyaNovaQBI/Timestamp.cs
diff --git a/AyaNovaQBI/AyaNovaQBI.csproj b/AyaNovaQBI/AyaNovaQBI.csproj
index ffb123d..eba3cb3 100644
--- a/AyaNovaQBI/AyaNovaQBI.csproj
+++ b/AyaNovaQBI/AyaNovaQBI.csproj
@@ -50,10 +50,9 @@
     <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="interop.QBFC14, Version=15.0.0.1, Culture=neutral, PublicKeyToken=31d8aec643e18259, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
+    <Reference Include="Interop.QBFC15">
+      <HintPath>..\libs\QuickBooks\Interop.QBFC15.dll</HintPath>
       <EmbedInteropTypes>True</EmbedInteropTypes>
-      <HintPath>..\..\..\..\Program Files (x86)\Common Files\Intuit\QuickBooks\interop.QBFC14.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>packages\Newtonsoft.Json.13.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
diff --git a/AyaNovaQBI/util.cs b/AyaNovaQBI/util.cs
index d180729..4ef4067 100644
--- a/AyaNovaQBI/util.cs
+++ b/AyaNovaQBI/util.cs
@@ -1,4 +1,4 @@
-using Interop.QBFC14;
+using Interop.QBFC15;
 using Newtonsoft.Json.Linq;
 using System;
 using System.Collections;
diff --git a/install/qbi.iss b/install/qbi.iss
index 2b65d4a..a9dafae 100644
--- a/install/qbi.iss
+++ b/install/qbi.iss
@@ -54,8 +54,8 @@ function CheckForQBFC(): Boolean;
 begin
   if not QBFCChecked then begin
     QBFCCheckResult := True;
-    if not FileExists(ExpandConstant('{commoncf32}\Intuit\QuickBooks\QBFC14.dll')) then begin
-      QBFCCheckResult := MsgBox('QBFC14 does not appear to have been installed as required prior to QBI.' #13#13 'File: ' + ExpandConstant('{commoncf32}\Intuit\QuickBooks\QBFC14.dll') + ' was not found.'#13#13'Do you want to install QBI anyway?', mbConfirmation, MB_YESNO) = idYes;
+    if not FileExists(ExpandConstant('{commoncf32}\Intuit\QuickBooks\QBFC15.dll')) then begin
+      QBFCCheckResult := MsgBox('QBFC15 does not appear to have been installed as required prior to QBI.' #13#13 'File: ' + ExpandConstant('{commoncf32}\Intuit\QuickBooks\QBFC15.dll') + ' was not found.'#13#13'Do you want to install QBI anyway?', mbConfirmation, MB_YESNO) = idYes;
       if not QBFCCheckResult then begin
       WizardForm.CancelButton.OnClick(WizardForm.CancelButton);
       end;