diff --git a/src/main.rs b/src/main.rs
index 987f726..1539fc9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,8 @@
 use indexmap::IndexMap;
-use log::{error, info, LevelFilter};
+use log::{debug, error, info, LevelFilter};
 use serde_derive::Deserialize;
 use simple_logger::SimpleLogger;
+use std::env;
 #[cfg(target_os = "windows")]
 use std::io;
 use std::io::Error;
@@ -43,25 +44,35 @@ pub struct ChampInfo {
 const USER_AGENT_KEY: &str = "User-Agent";
 const USER_AGENT_VALUE: &str =
     "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0";
-const LOL_CHAMPS_DIR: &str = ".\\champs";
+const DEFAULT_LOL_CHAMPS_DIR: &str = ".\\champs";
+const REG_KEY_LOL_RADS: &str = r"SOFTWARE\WOW6432Node\Riot Games\RADS";
+const REG_KEY_LOL_INC: &str = r"SOFTWARE\WOW6432Node\Riot Games, Inc\League of Legends";
+const REG_KEY_WIN_64_UNINSTALL: &str =
+    r"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
+const REG_KEY_WIN_UNINSTALL: &str = r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\";
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let args: Vec<String> = env::args().collect();
+    let mut level = LevelFilter::Info;
+    for s in &args {
+        if s.eq_ignore_ascii_case("-v") || s.eq_ignore_ascii_case("--verbose") {
+            level = LevelFilter::Debug;
+        }
+    }
     SimpleLogger::new()
-        .with_level(LevelFilter::Info)
+        .with_level(level)
         .with_module_level("ureq", LevelFilter::Error)
         .init()?;
-
     info!("CGG Item Sets");
 
     let lol_champs_dir = match lol_champ_dir() {
         Ok(x) => x,
-        Err(_e) => PathBuf::from(LOL_CHAMPS_DIR),
+        Err(_e) => PathBuf::from(DEFAULT_LOL_CHAMPS_DIR),
     };
     info!(
         "LoL Champs Folder: {}",
-        lol_champs_dir.to_str().unwrap_or(LOL_CHAMPS_DIR)
+        lol_champs_dir.to_str().unwrap_or(DEFAULT_LOL_CHAMPS_DIR)
     );
-
     let client = ureq::AgentBuilder::new()
         .timeout(Duration::from_secs(10))
         .build();
@@ -139,55 +150,61 @@ fn get_champ_from_key(champs: &Champion, key: &str) -> Option<String> {
 #[cfg(target_os = "windows")]
 fn lol_champ_dir() -> Result<PathBuf, Error> {
     let hklm = RegKey::predef(winreg::enums::HKEY_LOCAL_MACHINE);
-
-    let node = hklm.open_subkey(r"SOFTWARE\WOW6432Node\Riot Games\RADS");
-    if node.is_ok() {
-        let val: String = node?.get_value("LocalRootFolder")?;
-        return Ok(PathBuf::from(val).parent().unwrap().to_path_buf());
+    let path = if let Ok(node) = hklm.open_subkey(REG_KEY_LOL_RADS) {
+        debug!(
+            "Use registry key {} for relative champ directory",
+            REG_KEY_LOL_RADS
+        );
+        let val: String = node.get_value("LocalRootFolder")?;
+        // TODO: remplacer ce .unwrap()
+        PathBuf::from(val).parent().unwrap().to_path_buf()
+    } else if let Ok(node) = hklm.open_subkey(REG_KEY_LOL_INC) {
+        debug!(
+            "Use registry key {} for relative champ directory",
+            REG_KEY_LOL_INC
+        );
+        let val: String = node.get_value("Location")?;
+        PathBuf::from(val)
+    } else if let Ok(node) =
+        find_subnode_from_path(hklm, REG_KEY_WIN_64_UNINSTALL, "League of Legends")
+    {
+        debug!(
+            "Use registry key {} for relative champ directory",
+            REG_KEY_WIN_64_UNINSTALL
+        );
+        let val: String = node.get_value("InstallLocation")?;
+        PathBuf::from(val)
+    } else if let Ok(node) = find_subnode_from_path(
+        RegKey::predef(winreg::enums::HKEY_CURRENT_USER),
+        REG_KEY_WIN_UNINSTALL,
+        "Riot Game league_of_legends.live",
+    ) {
+        debug!(
+            "Use registry key {} for relative champ directory",
+            REG_KEY_WIN_UNINSTALL
+        );
+        let val: String = node.get_value("InstallLocation")?;
+        PathBuf::from(val)
     } else {
-        let node = hklm.open_subkey(r"SOFTWARE\WOW6432Node\Riot Games, Inc\League of Legends");
-        if node.is_ok() {
-            let val: String = node?.get_value("Location")?;
-            return Ok(PathBuf::from(val));
-        }
-    }
-
-    let node = hklm.open_subkey(r"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall");
-    let mut sub_node: io::Result<RegKey> = Err(Error::from(ErrorKind::NotFound));
-
-    if let Ok(n) = node {
-        let key = n
-            .enum_keys()
-            .map(|x| x.unwrap())
-            .find(|x| x.starts_with("League of Legends"));
-        if let Some(k) = key {
-            sub_node = n.open_subkey(k);
-        }
-    }
-
-    if sub_node.is_err() {
-        let hkcu = RegKey::predef(winreg::enums::HKEY_CURRENT_USER);
-        let node = hkcu.open_subkey(r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\");
-        if let Ok(n) = node {
-            let key = n
-                .enum_keys()
-                .map(|x| x.unwrap())
-                .find(|x| x == "Riot Game league_of_legends.live");
-            if let Some(k) = key {
-                sub_node = n.open_subkey(k);
-            }
-        }
-    }
-
-    if sub_node.is_ok() {
-        let val: String = sub_node?.get_value("InstallLocation")?;
-        return Ok(PathBuf::from(val).join("Config").join("Champions"));
-    }
-
-    Err(Error::from(ErrorKind::NotFound))
+        return Err(Error::from(ErrorKind::NotFound));
+    };
+    Ok(PathBuf::from(path).join("Config").join("Champions"))
 }
 
 #[cfg(not(target_os = "windows"))]
 fn lol_champ_dir() -> Result<PathBuf, Error> {
-    Ok(PathBuf::from(LOL_CHAMPS_DIR))
+    Ok(PathBuf::from(DEFAULT_LOL_CHAMPS_DIR))
+}
+
+fn find_subnode_from_path(reg: RegKey, path: &str, key: &str) -> io::Result<RegKey> {
+    if let Ok(node) = reg.open_subkey(path) {
+        if let Some(k) = node
+            .enum_keys()
+            .map(|x| x.unwrap())
+            .find(|x| x.starts_with(key))
+        {
+            return node.open_subkey(k);
+        }
+    }
+    Err(Error::from(ErrorKind::NotFound))
 }