Update index.js

index.js

   return new Promise((resolve, reject) => {
     fs.access(file, fs.constants.F_OK, (err) => {
       if (err && err.code === "ENOENT") {
-        reject(new Error(`${file} does not exist`));
+        resolve(false);
       } else {
         resolve(true);
       }
     `${outputDir}${outputImg}`,
   ];
   const libreOfficeBins = [
-    libreofficeBin,
+    ...(libreofficeBin ? [libreofficeBin] : []),
     ...(Array.isArray(libreofficeBins) ? libreofficeBins : [])
 
   ];
   if (!libreofficeBin) {
-    libreOfficeBins.push(path.resolve("C:\\\\Program Files\\\\LibreOffice\\\\program\\\\soffice.exe"));
-    libreOfficeBins.push(path.resolve("C:\\\\Program Files (x86)\\\\LibreOffice\\\\program\\\\soffice.exe"));
-    libreOfficeBins.push(path.resolve("C:\\\\Program Files (x86)\\\\LIBREO~1\\\\program\\\\soffice.exe"));
     libreOfficeBins.push(path.resolve("/usr/bin/libreoffice"));
     libreOfficeBins.push(path.resolve("/usr/bin/soffice"));
     libreOfficeBins.push(path.resolve("/Applications/LibreOffice.app/Contents/MacOS/soffice"));
+    libreOfficeBins.push(path.resolve("C:\\\\Program Files\\\\LibreOffice\\\\program\\\\soffice.exe"));
+    libreOfficeBins.push(path.resolve("C:\\\\Program Files (x86)\\\\LibreOffice\\\\program\\\\soffice.exe"));
+    libreOfficeBins.push(path.resolve("C:\\\\Program Files (x86)\\\\LIBREO~1\\\\program\\\\soffice.exe"));
   }
 
   return getFileThatExist(...libreOfficeBins).then((libreofficeBin) => {
     if (libreofficeBin) {
+      //Re arrange the array for more efficient future runs
+      if (libreOfficeBins[0] !== libreofficeBin) {
+        libreOfficeBins.splice(libreOfficeBins.indexOf(libreofficeBin), 1);
+        libreOfficeBins.unshift(libreofficeBin);
+      }
       return filesExist(sourceFile).then((srcExist) => {
         if (srcExist) {
           if (ext === ".pdf")