diff --git a/cs/libconsh/cg.cpp b/cs/libconsh/cg.cpp
index ed9e7ff..972ad84 100644
--- a/cs/libconsh/cg.cpp
+++ b/cs/libconsh/cg.cpp
@@ -14,6 +14,7 @@ All rights reserved.
 
 #include "StdAfx.h"
 #include <time.h>
+#include <filesystem>
 #include "machine-min.h"					// 03/08/00 AM.
 #include "prim/libprim.h"
 #include "lite/global.h"
@@ -53,7 +54,6 @@ All rights reserved.
 #include "cmd.h"
 #include "dyn.h"					// 06/29/00 AM.
 #include "lite/dir.h"
-#include "lite/io.h"
 
 #include "prim/unicu.h"
 using namespace unicu;
@@ -3489,18 +3489,16 @@ return word;
 CONCEPT *CG::matchDictKB(std::string dictFilename, std::vector<std::filesystem::path> kbfiles) {
 	if (kbfiles.size() == 0) return NULL;
 	std::vector<std::filesystem::path>::iterator ptr;
-
-	_TCHAR buff[MAXSTR], buffkb[MAXSTR];
-	_TCHAR *head, *headkb;
+	
 	CONCEPT *con, *dictcon;
-	_tcscpy(buff, dictFilename.c_str());
-	file_head(buff, head);
+	std::filesystem::path filePath(dictFilename);
+	std::string head = removeExtension(filePath.filename().string());
 
     for (ptr = kbfiles.begin(); ptr < kbfiles.end(); ptr++) {
-		_tcscpy(buffkb, ptr->string().c_str());
-		file_head(buff, headkb);
+		std::filesystem::path kbpath(ptr->string());
+		std::string headkb = removeExtension(kbpath.filename().string());
 
-        if (!_tcscmp(head,headkb)) {
+        if (std::strcmp(head.c_str(), headkb.c_str()) == 0) {
 			con = findRoot();
 			dictcon = findConcept(con,"dictionary");
 			if (dictcon) {
@@ -3511,6 +3509,13 @@ CONCEPT *CG::matchDictKB(std::string dictFilename, std::vector<std::filesystem::
 	return NULL;
 }
 
+std::string CG::removeExtension(const std::string& filename) {
+    size_t lastDot = filename.find_last_of(".");
+    if (lastDot == std::string::npos)
+        return filename;
+    return filename.substr(0, lastDot);
+}
+
 bool CG::openDict(std::vector<std::filesystem::path>& files) {
 	bool found = false;
 	files.clear();
diff --git a/include/Api/consh/cg.h b/include/Api/consh/cg.h
index d73137a..511650a 100644
--- a/include/Api/consh/cg.h
+++ b/include/Api/consh/cg.h
@@ -214,6 +214,7 @@ class LIBCONSH_API CG
 	CONCEPT *findWordConcept(_TCHAR*);								// 06/29/03 AM.
 
 	CONCEPT *matchDictKB(std::string dictFilename, std::vector<std::filesystem::path> kbfiles);
+	std::string removeExtension(const std::string& filename);
 	bool openDict(std::vector<std::filesystem::path>& files);
 	bool readDicts(std::vector<std::filesystem::path> files, std::vector<std::filesystem::path> kbfiles);
 	bool readDict(std::string file, std::vector<std::filesystem::path> kbfiles);
diff --git a/include/Api/lite/io.h b/include/Api/lite/io.h
deleted file mode 100644
index 97a0323..0000000
--- a/include/Api/lite/io.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/*******************************************************************************
-Copyright (c) 2001-2010 by Text Analysis International, Inc.
-All rights reserved.
-********************************************************************************
-*
-* NAME:	IO.H
-* FILE:	lite\io.h
-* CR:		10/06/98 AM.
-* SUBJ:	Declares for I/O functions.
-*
-*******************************************************************************/
-
-//#include "fstream.h"
-
-void copy_file(const _TCHAR *, const _TCHAR *);
-bool file_exists(const _TCHAR *iname);				// 12/14/98 AM.
-void file_to_buffer(const _TCHAR *, _TCHAR *,
-	/*UP*/ long &len															// 05/28/00 /AM.
-	);
-_TCHAR *pretty_char(_TCHAR);
-_TCHAR *pretty_str(
-	_TCHAR *str,				// String to be prettified.
-	_TCHAR *buf,				// Buffer for placing prettified string.
-	long size
-	);
-_TCHAR *c_char(_TCHAR,_TCHAR*);												// 05/10/00 AM.
-_TCHAR *c_str(																	// 05/10/00 AM.
-	_TCHAR *str,				// String to be prettified.
-	_TCHAR *buf,				// Buffer for placing prettified string.
-	long size			// Buffer size. (-1 means count not used.)
-	);
-
-
-void read_file(
-	_TCHAR *fname,		// The filename
-	/*UP*/
-	long &len,			// Length of file.
-	_TCHAR* &buf			// Buffer to create.
-	)
-	;
-
-_TCHAR *next_token(/*DU*/ _TCHAR* &buf, bool &eol, _TCHAR *comment);
-
-bool fix_file_name(
-	_TCHAR *file,				// Buffer big enough to hold extension.
-	_TCHAR *suff				// File name extension needed.
-	)
-	;
-
-bool eq_str_range(_TCHAR *str, _TCHAR *ptr, long start, long end);
-
-_TCHAR *make_str(_TCHAR *str);
-_TCHAR *make_str(_TCHAR *str, long len);
-
-bool strcat_e(
-	/*DU*/ _TCHAR* &ptr,
-	/*DN*/ _TCHAR *str,
-	/*DU*/ long &count
-	);
-
-
-bool strncat_e(
-	/*DU*/ _TCHAR* &ptr,
-	/*DN*/ _TCHAR *str,
-	/*DN*/ long len,
-	/*DU*/ long &count
-	);
-
-
-bool file_name(															// 12/24/99 AM.
-	_TCHAR *file,				// Buffer with full file string.
-	/*UP*/
-	_TCHAR* &fname			// Pointer to the name in buffer.
-	);
-bool file_path(															// 12/24/99 AM.
-	_TCHAR *file,				// Buffer with full file string.
-	/*UP*/
-	_TCHAR* &fpath			// Pointer to the path in buffer.
-	);
-bool file_parent(
-	_TCHAR *file,				// Buffer with full file string.
-	/*UP*/
-	_TCHAR* &fpath			// Pointer to the path in buffer.
-	);
-bool file_head(															// 12/24/99 AM.
-	_TCHAR *file,				// Buffer with full file string.
-	/*UP*/
-	_TCHAR* &fhead			// Pointer to the file head in buffer.
-	);
-bool file_tail(															// 12/24/99 AM.
-	_TCHAR *file,				// Buffer with full file string.
-	/*UP*/
-	_TCHAR* &ftail			// Pointer to tail in buffer.
-	);