diff --git a/src/backend/game.cpp b/src/backend/game.cpp
index 18ed5ef9..e29e08ac 100644
--- a/src/backend/game.cpp
+++ b/src/backend/game.cpp
@@ -62,6 +62,26 @@ namespace loot {
         return games;
     }
 
+    size_t SelectGame(const YAML::Node& settings, const std::vector<Game>& games, const std::string& cmdLineGame) {
+        string preferredGame(cmdLineGame);
+        if (preferredGame.empty()) {
+            // Get preferred game from settings.
+            if (settings["Game"] && settings["Game"].as<string>() != "auto")
+                preferredGame = settings["Game"].as<string>();
+            else if (settings["Last Game"] && settings["Last Game"].as<string>() != "auto")
+                preferredGame = settings["Last Game"].as<string>();
+        }
+
+        // Get index of preferred game if there is one.
+        for (size_t i = 0; i < games.size(); ++i) {
+            if (preferredGame.empty() && games[i].IsInstalled())
+                return i;
+            else if (!preferredGame.empty() && preferredGame == games[i].FolderName() && games[i].IsInstalled())
+                return i;
+        }
+        throw error(error::no_game_detected, "None of the supported games were detected.");
+    }
+
     // MetadataList member functions
     //------------------------------
 
@@ -588,20 +608,20 @@ namespace loot {
 
     void Game::LoadPlugins(bool headersOnly) {
         boost::thread_group group;
-        size_t meanFileSize = 0;
-        unordered_map<std::string, size_t> tempMap;
+        uintmax_t meanFileSize = 0;
+        unordered_map<std::string, uintmax_t> tempMap;
         std::vector<Plugin*> groupPlugins;
         //First calculate the mean plugin size. Store it temporarily in a map to reduce filesystem lookups and file size recalculation.
         for (fs::directory_iterator it(this->DataPath()); it != fs::directory_iterator(); ++it) {
             if (fs::is_regular_file(it->status()) && IsPlugin(it->path().string())) {
 
-                size_t fileSize = fs::file_size(it->path());
+                uintmax_t fileSize = fs::file_size(it->path());
                 meanFileSize += fileSize;
 
                 tempMap.emplace(it->path().filename().string(), fileSize);
             }
         }
-        meanFileSize /= tempMap.size();
+        meanFileSize /= tempMap.size();  //Rounding error, but not important.
 
         //Now load plugins.
         for (const auto &pluginPair : tempMap) {
diff --git a/src/backend/game.h b/src/backend/game.h
index c15f13a6..540c53b1 100644
--- a/src/backend/game.h
+++ b/src/backend/game.h
@@ -157,6 +157,8 @@ namespace loot {
     };
 
     std::vector<Game> GetGames(const YAML::Node& settings);
+
+    size_t SelectGame(const YAML::Node& settings, const std::vector<Game>& games, const std::string& cmdLineGame);
 }
 
 #endif
diff --git a/src/gui/main.cpp b/src/gui/main.cpp
index bc595d80..15ea9edf 100644
--- a/src/gui/main.cpp
+++ b/src/gui/main.cpp
@@ -34,18 +34,12 @@
 #include "../backend/helpers.h"
 #include "../backend/generators.h"
 #include "../backend/streams.h"
-//#include "../backend/graph.h"
 
-#include <ostream>
 #include <algorithm>
-#include <iterator>
-#include <ctime>
 #include <clocale>
-#include <unordered_map>
 
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/detail/utf8_codecvt_facet.hpp>
-#include <boost/algorithm/string.hpp>
 #include <boost/format.hpp>
 #include <boost/locale.hpp>
 #include <boost/log/core.hpp>
@@ -54,7 +48,6 @@
 #include <boost/log/utility/setup/file.hpp>
 #include <boost/log/utility/setup/common_attributes.hpp>
 #include <boost/log/support/date_time.hpp>
-#include <boost/thread.hpp>
 
 #include <wx/snglinst.h>
 #include <wx/aboutdlg.h>
@@ -237,7 +230,6 @@ bool LOOT::OnInit() {
 
     BOOST_LOG_TRIVIAL(debug) << "Selecting game.";
     string target;
-    int gameIndex = -1;
 
     wxCmdLineEntryDesc cmdLineDesc[2];
     cmdLineDesc[0].kind = wxCMD_LINE_OPTION;
@@ -263,36 +255,18 @@ bool LOOT::OnInit() {
         break;
     }
 
-    if (target.empty()) {
-        if (_settings["Game"] && _settings["Game"].as<string>() != "auto")
-            target = _settings["Game"].as<string>();
-        else if (_settings["Last Game"] && _settings["Last Game"].as<string>() != "auto")
-            target = _settings["Last Game"].as<string>();
+    size_t gameIndex(0);
+    try {
+        gameIndex = SelectGame(_settings, _games, target);
     }
-
-    if (!target.empty()) {
-        for (size_t i=0, max=_games.size(); i < max; ++i) {
-            if (target == _games[i].FolderName() && _games[i].IsInstalled())
-                gameIndex = i;
-        }
-    }
-    if (gameIndex < 0) {
-        //Set gameIndex to the first installed game.
-        for (size_t i=0, max=_games.size(); i < max; ++i) {
-            if (_games[i].IsInstalled()) {
-                gameIndex = i;
-                break;
-            }
-        }
-        if (gameIndex < 0) {
-            BOOST_LOG_TRIVIAL(error) << "None of the supported games were detected.";
-            wxMessageBox(
-                translate("Error: None of the supported games were detected."),
-                translate("LOOT: Error"),
-                wxOK | wxICON_ERROR,
-                nullptr);
-            return false;
-        }
+    catch (exception &e) {
+        BOOST_LOG_TRIVIAL(error) << "None of the supported games were detected.";
+        wxMessageBox(
+            translate("Error: None of the supported games were detected."),
+            translate("LOOT: Error"),
+            wxOK | wxICON_ERROR,
+            nullptr);
+        return false;
     }
     BOOST_LOG_TRIVIAL(debug) << "Game selected is " << _games[gameIndex].Name();