diff --git a/data_from_portwine/scripts/functions_helper b/data_from_portwine/scripts/functions_helper
index f5c06d1d..be7b1aa5 100755
--- a/data_from_portwine/scripts/functions_helper
+++ b/data_from_portwine/scripts/functions_helper
@@ -1405,7 +1405,7 @@ check_nvidia_rtx () {
 
 pw_init_db () {
     if [[ -f "${portwine_exe}" ]] ; then
-        PORTWINE_DB="$(basename "${portwine_exe}" .exe)"
+        PORTWINE_DB="$(basename "${portwine_exe%.[Ee][Xx][Ee]}")"
         export PORTWINE_DB
         if echo "${PORTWINE_DB}" | grep -i "_vo_\|_gv_" &>/dev/null ; then
             print_warning "Force use gamesvoice.ppdb file!"
@@ -1747,7 +1747,7 @@ pw_create_gui_png () {
             then
                 PORTPROTON_NAME="$PW_PRODUCTNAME"
             else
-                PORTPROTON_NAME="$(basename "${portwine_exe}" .exe)"
+                PORTPROTON_NAME="$(basename "${portwine_exe%.[Ee][Xx][Ee]}")"
             fi
         fi
 
@@ -3105,17 +3105,17 @@ portwine_launch () {
     fi
 
     case "$portwine_exe" in
-        *.exe)
+        *.[Ee][Xx][Ee])
             pw_run ${PW_VD_TMP[@]} ${WINE_WIN_START} "$portwine_exe"
         ;;
-        *.bat)
+        *.[Bb][Aa][Tt])
             PW_USE_TERMINAL=1
             pw_run ${PW_VD_TMP[@]} cmd /c "$portwine_exe"
         ;;
-        *.msi)
+        *.[Mm][Ss][Ii])
             pw_run ${PW_VD_TMP[@]} msiexec /i "$portwine_exe"
         ;;
-        *.reg)
+        *.[Rr][Ee][Gg])
             pw_run ${PW_VD_TMP[@]} regedit "$portwine_exe"
         ;;
         *)
diff --git a/data_from_portwine/scripts/start.sh b/data_from_portwine/scripts/start.sh
index aa4b18cc..d92fe94a 100755
--- a/data_from_portwine/scripts/start.sh
+++ b/data_from_portwine/scripts/start.sh
@@ -30,14 +30,14 @@ export orig_IFS="$IFS"
 MISSING_DESKTOP_FILE="0"
 
 unset PW_NO_RESTART_PPDB PW_DISABLED_CREATE_DB
-if [[ "$1" == *.ppack ]] ; then
+if [[ "$1" == *.[Pp][Pp][Aa][Cc][Kk] ]] ; then
     export PW_NO_RESTART_PPDB="1"
     export PW_DISABLED_CREATE_DB="1"
     portwine_exe="$1"
 elif [[ -f "$1" ]] ; then
     portwine_exe="$(realpath "$1")"
 elif [[ -f "$OLDPWD/$1" ]] \
-&& [[ "$1" == *.exe || "$1" == *.bat || "$1" == *.reg || "$1" == *.msi ]]
+&& [[ "$1" == *.[Ee][Xx][Ee] || "$1" == *.[Bb][Aa][Tt] || "$1" == *.[Rr][Ee][Gg] || "$1" == *.[Mm][Ss][Ii] ]]
 then
     portwine_exe="$(realpath "$OLDPWD/$1")"
 elif [[ "$1" == "--debug" ]] \
@@ -46,10 +46,10 @@ then
     portwine_exe="$(realpath "$2")"
 elif [[ "$1" == "--debug" ]] \
 && [[ -f "$OLDPWD/$2" ]] \
-&& [[ "$2" == *.exe || "$2" == *.bat || "$2" == *.reg || "$2" == *.msi ]]
+&& [[ "$2" == *.[Ee][Xx][Ee] || "$2" == *.[Bb][Aa][Tt] || "$2" == *.[Rr][Ee][Gg] || "$2" == *.[Mm][Ss][Ii] ]]
 then
     portwine_exe="$(realpath "$OLDPWD/$2")"
-elif [[ "$1" == *.exe || "$1" == *.bat || "$1" == *.msi || "$1" == *.reg ]]
+elif [[ "$1" == *.[Ee][Xx][Ee] || "$1" == *.[Bb][Aa][Tt] || "$1" == *.[Mm][Ss][Ii] || "$1" == *.[Rr][Ee][Gg] ]]
 then
     portwine_exe="$1"
     MISSING_DESKTOP_FILE=1