diff --git a/extensions/regexfilter.ui b/extensions/regexfilter.ui
index add034b..edd6e77 100644
--- a/extensions/regexfilter.ui
+++ b/extensions/regexfilter.ui
@@ -16,6 +16,13 @@
      <item>
       <widget class="QLineEdit" name="regexEdit"/>
      </item>
+     <item>
+      <widget class="QPushButton" name="saveButton">
+       <property name="text">
+        <string>Save</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>
@@ -28,13 +35,6 @@
      </property>
     </widget>
    </item>
-   <item>
-    <widget class="QPushButton" name="saveButton">
-     <property name="text">
-      <string>Save</string>
-     </property>
-    </widget>
-   </item>
    <item>
     <widget class="QLabel">
      <property name="text">
diff --git a/extensions/removerepeatphrase.cpp b/extensions/removerepeatphrase.cpp
index e24a98b..a23f4d1 100644
--- a/extensions/removerepeatphrase.cpp
+++ b/extensions/removerepeatphrase.cpp
@@ -16,10 +16,10 @@ std::vector<int> GenerateSuffixArray(const std::wstring& text)
 		eqClasses[suffixArray[0]] = 0;
 		for (int i = 1; i < text.size(); ++i)
 		{
-			int currentSuffix = suffixArray[i];
-			int lastSuffix = suffixArray[i - 1];
+			int currentSuffix = suffixArray[i], lastSuffix = suffixArray[i - 1];
 			if (currentSuffix + length < text.size() && prevEqClasses[currentSuffix] == prevEqClasses[lastSuffix] &&
-				prevEqClasses[currentSuffix + length / 2] == prevEqClasses.at(lastSuffix + length / 2)) // not completely certain that this will stay in range
+				prevEqClasses[currentSuffix + length / 2] == prevEqClasses[lastSuffix + length / 2]
+			)
 				eqClasses[currentSuffix] = eqClasses[lastSuffix];
 			else eqClasses[currentSuffix] = i;
 		}
diff --git a/extensions/threadlinker.cpp b/extensions/threadlinker.cpp
index 3f69000..fb4ff00 100644
--- a/extensions/threadlinker.cpp
+++ b/extensions/threadlinker.cpp
@@ -4,11 +4,12 @@
 
 extern const char* THREAD_LINKER;
 extern const char* LINK;
+extern const char* UNLINK;
 extern const char* THREAD_LINK_FROM;
 extern const char* THREAD_LINK_TO;
 extern const char* HEXADECIMAL;
 
-std::unordered_map<int64_t, std::unordered_multiset<int64_t>> linkedTextHandles;
+std::unordered_map<int64_t, std::unordered_set<int64_t>> linkedTextHandles;
 std::shared_mutex m;
 
 class Window : public QDialog, Localizer
@@ -17,9 +18,14 @@ public:
 	Window() : QDialog(nullptr, Qt::WindowMinMaxButtonsHint)
 	{
 		connect(&linkButton, &QPushButton::clicked, this, &Window::Link);
+		connect(&unlinkButton, &QPushButton::clicked, this, &Window::Unlink);
 
 		layout.addWidget(&linkList);
-		layout.addWidget(&linkButton);
+		layout.addLayout(&buttons);
+		buttons.addSpacerItem(new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::Expanding));
+		buttons.addWidget(&linkButton);
+		buttons.addWidget(&unlinkButton);
+		buttons.addSpacerItem(new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::Expanding));
 
 		setWindowTitle(THREAD_LINKER);
 		QMetaObject::invokeMethod(this, &QWidget::show, Qt::QueuedConnection);
@@ -34,14 +40,13 @@ private:
 		if (ok1 && ok2 && ok3 && ok4)
 		{
 			std::scoped_lock lock(m);
-			linkedTextHandles[from].insert(to);
-			linkList.addItem(QString::number(from, 16) + "->" + QString::number(to, 16));
+			if (linkedTextHandles[from].insert(to).second) linkList.addItem(QString::number(from, 16) + "->" + QString::number(to, 16));
 		}
 	}
 
-	void keyPressEvent(QKeyEvent* event) override
+	void Unlink()
 	{
-		if (event->key() == Qt::Key_Delete && linkList.currentItem())
+		if (linkList.currentItem())
 		{
 			QStringList link = linkList.currentItem()->text().split("->");
 			linkList.takeItem(linkList.currentRow());
@@ -50,18 +55,22 @@ private:
 		}
 	}
 
+	void keyPressEvent(QKeyEvent* event) override
+	{
+		if (event->key() == Qt::Key_Delete) Unlink();
+	}
+
 	QHBoxLayout layout{ this };
+	QVBoxLayout buttons;
 	QListWidget linkList{ this };
-	QPushButton linkButton{ LINK, this };
+	QPushButton linkButton{ LINK, this }, unlinkButton{ UNLINK, this };
 } window;
 
 bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo)
 {
 	std::shared_lock lock(m);
-	int64_t textHandle = sentenceInfo["text number"];
-
-	for (auto linkedHandle : linkedTextHandles[textHandle])
-		((void(*)(int64_t, const wchar_t*))sentenceInfo["void (*AddText)(int64_t number, const wchar_t* text)"])(linkedHandle, sentence.c_str());
-
+	auto links = linkedTextHandles.find(sentenceInfo["text number"]);
+	if (links != linkedTextHandles.end()) for (auto link : links->second)
+		((void(*)(int64_t, const wchar_t*))sentenceInfo["void (*AddText)(int64_t number, const wchar_t* text)"])(link, sentence.c_str());
 	return false;
 }
diff --git a/text.cpp b/text.cpp
index 6686a3e..fc9ca82 100644
--- a/text.cpp
+++ b/text.cpp
@@ -221,6 +221,7 @@ Whitespace in original_text is ignored, but replacement_text can contain spaces,
 This file must be encoded in Unicode (UTF-16 Little Endian).)";
 const char* THREAD_LINKER = u8"Thread Linker";
 const char* LINK = u8"Link";
+const char* UNLINK = u8"Unlink";
 const char* THREAD_LINK_FROM = u8"Thread number to link from";
 const char* THREAD_LINK_TO = u8"Thread number to link to";
 const char* HEXADECIMAL = u8"Hexadecimal";