diff --git a/lib7zip/__init__.py b/lib7zip/__init__.py
index 8ff078d..9306011 100644
--- a/lib7zip/__init__.py
+++ b/lib7zip/__init__.py
@@ -62,8 +62,12 @@
         aKey = OpenKey(HKEY_LOCAL_MACHINE, r"SOFTWARE\7-Zip", 0, KEY_READ)
         s7z_path = QueryValueEx(aKey, "Path")[0]
     except FileNotFoundError:
-        s7z_path = os.path.normpath('B:/tools/7z1604')
+        s7z_path = os.path.normpath('C:/Program Files/7-Zip')
     dll_paths.append(os.path.join(s7z_path, '7z.dll'))
+    
+    # add common zip install paths
+    #dll_paths.append(os.path.join("%PROGRAMFILES%\7-Zip", '7z.dll'))
+    #dll_paths.append(os.path.join("C:\Portableapps\7-Zip\App", '7z.dll'))
 
     ole32 = ffi.dlopen('ole32')
     free_propvariant = lambda x: ole32.PropVariantClear(x)
@@ -83,7 +87,7 @@ def free_propvariant(void_p):
 
 
     suffixes = '', '7z.so', 'p7zip/7z.so'
-    prefixes = ['/lib', '/usr/lib']
+    prefixes = ['/lib', '/usr/lib', '/data/data/com.termux/files/usr/lib']
     for suffix in suffixes:
         for prefix in prefixes:
             dll_paths.append(os.path.join(prefix, suffix))
@@ -224,6 +228,8 @@ def get_method_info():
 extensions = get_extensions_to_formats()
 # print(formats.values())
 max_sig_size = max(len(f.start_signature or b'') for f in formats.values())
+if max_sig_size < 4096:
+	max_sig_size = 4096
 getting_meths = True
 methods = get_method_info()
 
diff --git a/lib7zip/archive.py b/lib7zip/archive.py
index 8eb35c9..892fb0e 100644
--- a/lib7zip/archive.py
+++ b/lib7zip/archive.py
@@ -126,7 +126,7 @@ def __init__(self, filename: os.PathLike, stream=None, in_stream=None, forcetype
     @staticmethod
     def formats_by_path(path: PurePath) -> Iterator[str]:
         for suffix in reversed(path.suffixes):
-            names = extensions.get(suffix.lstrip('.'), None)
+            names = extensions.get(suffix.lower().lstrip('.'), None)
             if names is not None:
                 yield from names
 
@@ -159,6 +159,10 @@ def filter_unique(name):
         def filter_applicable_format(name, format):
             if format.start_signature and startswith(format.start_signature):
                 yield from filter_unique(name)
+            elif format.start_signature and sigcmp.find(format.start_signature) > 0:  # skip possible headers
+                yield from filter_unique(name)
+            #elif str(filename).lower().endswith(format.extensions):  # match extensions only
+            #    yield from filter_unique(name)
 
         for name in format_names:
             yield from filter_applicable_format(name, formats[name])
@@ -167,7 +171,7 @@ def filter_applicable_format(name, format):
             yield from filter_unique(name)
 
         for name, format in formats.items():
-            if name in format_names:
+            if name in format_names or not format.start_signature:
                 continue
             yield from filter_applicable_format(name, format)
 
@@ -248,7 +252,7 @@ def arc_props_len(self) -> int:
         RNOK(self.archive.vtable.GetNumberOfArchiveProperties(self.archive, num))
         return int(num[0])
 
-    def get_arc_prop_info(self, index: int) -> tuple[Optional[str], ArchiveProps, VARTYPE]:
+    def get_arc_prop_info(self, index: int):  #  -> tuple[Optional[str], ArchiveProps, VARTYPE]
         propid = ffi.new('PROPID*')
         vt = ffi.new('VARTYPE*')
         name = ffi.new('wchar_t**')
@@ -263,11 +267,11 @@ def get_arc_prop_info(self, index: int) -> tuple[Optional[str], ArchiveProps, VA
                 free_string(name[0])
         return name_str, ArchiveProps(propid[0]), VARTYPE(vt[0])
 
-    def iter_arc_props_info(self) -> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE]]:
+    def iter_arc_props_info(self): # -> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE]]:
         for i in range(self.arc_props_len):
             yield self.get_arc_prop_info(i)
 
-    def iter_arc_props(self) -> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE, Any]]:
+    def iter_arc_props(self): #-> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE, Any]]:
         for name, prop, vt in self.iter_arc_props_info():
             val = get_prop_val(partial(self.archive.vtable.GetArchiveProperty, self.archive, prop))
             yield name, prop, vt, val
@@ -356,12 +360,12 @@ def __getattr__(self, attr):
         propid = getattr(py7ziptypes.ArchiveProps, attr)
         return get_prop_val(partial(self.archive.itm_prop_fn, self.index, propid))
 
-    def iter_props(self) -> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE, Any]]:
+    def iter_props(self): # -> Iterator[tuple[Optional[str], ArchiveProps, VARTYPE, Any]]:
         for name, prop, vt in self.archive.iter_props_info():
             val = get_prop_val(partial(self.archive.itm_prop_fn, self.index, prop))
             yield name, prop, vt, val
 
-    def get_seq_in_stream(self) -> Optional[Any]:
+    def get_seq_in_stream(self): # -> Optional[Any]:
         get_void_ptr = ffi.new('void**')
         archive = self.archive.archive
         res = archive.vtable.QueryInterface(