diff --git a/src/mdbx_chk.c b/src/mdbx_chk.c
index d0868d2c..9d222714 100644
--- a/src/mdbx_chk.c
+++ b/src/mdbx_chk.c
@@ -765,19 +765,17 @@ bailout:
 }
 
 static void usage(char *prog) {
-  fprintf(
-      stderr,
-      "usage: %s [-V] [-v] [-n] [-q] [-c] [-w] [-d] [-i] [-s subdb] dbpath\n"
-      "  -V\t\tprint version and exit\n"
-      "  -v\t\tmore verbose, could be used multiple times\n"
-      "  -n\t\tNOSUBDIR mode for open\n"
-      "  -q\t\tbe quiet\n"
-      "  -c\t\tforce cooperative mode (don't try exclusive)\n"
-      "  -w\t\tlock DB for writing while checking\n"
-      "  -d\t\tdisable page-by-page traversal of B-tree\n"
-      "  -i\t\tignore wrong order errors (for custom comparators case)\n"
-      "  -s subdb\tprocess a specific subdatabase only\n",
-      prog);
+  fprintf(stderr,
+          "usage: %s [-V] [-v] [-q] [-c] [-w] [-d] [-i] [-s subdb] dbpath\n"
+          "  -V\t\tprint version and exit\n"
+          "  -v\t\tmore verbose, could be used multiple times\n"
+          "  -q\t\tbe quiet\n"
+          "  -c\t\tforce cooperative mode (don't try exclusive)\n"
+          "  -w\t\tlock DB for writing while checking\n"
+          "  -d\t\tdisable page-by-page traversal of B-tree\n"
+          "  -i\t\tignore wrong order errors (for custom comparators case)\n"
+          "  -s subdb\tprocess a specific subdatabase only\n",
+          prog);
   exit(EXIT_INTERRUPTED);
 }
 
diff --git a/src/mdbx_copy.c b/src/mdbx_copy.c
index 81d177ab..cde9573a 100644
--- a/src/mdbx_copy.c
+++ b/src/mdbx_copy.c
@@ -45,11 +45,10 @@ static void signal_handler(int sig) {
 
 static void usage(const char *prog) {
   fprintf(stderr,
-          "usage: %s [-V] [-q] [-c] [-n] src_path [dest_path]\n"
+          "usage: %s [-V] [-q] [-c] src_path [dest_path]\n"
           "  -V\t\tprint version and exit\n"
           "  -q\t\tbe quiet\n"
           "  -c\t\tenable compactification (skip unused pages)\n"
-          "  -n\t\tNOSUBDIR mode for open\n"
           "  src_path\tsource database\n"
           "  dest_path\tdestination (stdout if not specified)\n",
           prog);
diff --git a/src/mdbx_dump.c b/src/mdbx_dump.c
index 8bb057b2..f97d50aa 100644
--- a/src/mdbx_dump.c
+++ b/src/mdbx_dump.c
@@ -160,7 +160,7 @@ static int dumpit(MDBX_txn *txn, MDBX_dbi dbi, char *name) {
 
 static void usage(char *prog) {
   fprintf(stderr,
-          "usage: %s [-V] [-q] [-f file] [-l] [-p] [-a|-s subdb] [-r] [-n] "
+          "usage: %s [-V] [-q] [-f file] [-l] [-p] [-a|-s subdb] [-r] "
           "dbpath\n"
           "  -V\t\tprint version and exit\n"
           "  -q\t\tbe quiet\n"
@@ -170,8 +170,7 @@ static void usage(char *prog) {
           "  -a\t\tdump main DB and all subDBs,\n"
           "    \t\tby default dump only the main DB\n"
           "  -s\t\tdump only the named subDB\n"
-          "  -r\t\trescure mode (ignore errors to dump corrupted DB)\n"
-          "  -n\t\tNOSUBDIR mode for open\n",
+          "  -r\t\trescure mode (ignore errors to dump corrupted DB)\n",
           prog);
   exit(EXIT_FAILURE);
 }
diff --git a/src/mdbx_load.c b/src/mdbx_load.c
index eb39cc11..ee193352 100644
--- a/src/mdbx_load.c
+++ b/src/mdbx_load.c
@@ -335,7 +335,7 @@ static int readline(MDBX_val *out, MDBX_val *buf) {
 
 static void usage(void) {
   fprintf(stderr,
-          "usage: %s [-V] [-q] [-a] [-f file] [-s name] [-N] [-T] [-r] [-n] "
+          "usage: %s [-V] [-q] [-a] [-f file] [-s name] [-N] [-T] [-r] "
           "dbpath\n"
           "  -V\t\tprint version and exit\n"
           "  -q\t\tbe quiet\n"
@@ -345,8 +345,7 @@ static void usage(void) {
           "  -s name\tload into named subDB\n"
           "  -N\t\tuse NOOVERWRITE on puts\n"
           "  -T\t\tread plaintext\n"
-          "  -r\t\trescure mode (ignore errors to load corrupted DB dump)\n"
-          "  -n\t\tNOSUBDIR mode for open\n",
+          "  -r\t\trescure mode (ignore errors to load corrupted DB dump)\n",
           prog);
   exit(EXIT_FAILURE);
 }
diff --git a/src/mdbx_stat.c b/src/mdbx_stat.c
index d1a805f9..31fe086e 100644
--- a/src/mdbx_stat.c
+++ b/src/mdbx_stat.c
@@ -54,15 +54,14 @@ static void prstat(MDBX_stat *ms) {
 
 static void usage(char *prog) {
   fprintf(stderr,
-          "usage: %s [-V] [-e] [-f[f[f]]] [-r[r]] [-a|-s name] [-n] dbpath\n"
+          "usage: %s [-V] [-e] [-f[f[f]]] [-r[r]] [-a|-s name] dbpath\n"
           "  -V\t\tprint version and exit\n"
           "  -e\t\tshow whole DB info\n"
           "  -f\t\tshow GC info\n"
           "  -r\t\tshow readers\n"
           "  -a\t\tprint stat of main DB and all subDBs\n"
           "  \t\t(default) print stat of only the main DB\n"
-          "  -s name\tprint stat of only the named subDB\n"
-          "  -n\t\tNOSUBDIR mode for open\n",
+          "  -s name\tprint stat of only the named subDB\n",
           prog);
   exit(EXIT_FAILURE);
 }