File counter rename script (0 external dependencies)

bulkRenamer.js

// only built-in Node.js dependencies
const fs = require('fs')
const path = require('path')
const util = require('util')

// working dir
const dir = 'C:\\Users\\werey\\Documents\\Scanned Documents'

// difference between file name counter and page number on image
const offset = 5

// temporary suffix (used only while program runs)
const TEMP_SUFFIX = 'TEMP_SUFFIX'

const rename = util.promisify(fs.rename);

async function main() {
    // 1st loop - prepare for renaming: rename + add temp suffix (not to override files with names collision)
    let files = fs.readdirSync(dir)
    for (const file of files) {
        // skip nested directories + misc files
        if (!file.startsWith('Image')) {
            continue;
        }
        const oldPath = path.resolve(dir, file)
        console.log('old  path  ', oldPath)
    
        const newName = file.replace(/(\d+)/g, (match, counter) => Number(counter) + offset).concat(TEMP_SUFFIX)
        const newPath = path.resolve(dir, newName)
        console.log('temp path 1', newPath)
        console.log('\n')
    
        await rename(oldPath, newPath);
    }

    // 2nd loop - final renaming: remove temp suffix
    files = fs.readdirSync(dir)
    for (const file of files) {
        if (!file.startsWith('Image')) {
            continue;
        }
        const oldPath = path.resolve(dir, file)
        console.log('temp path 2', oldPath)
    
        const newName = file.replace(TEMP_SUFFIX, '')
        const newPath = path.resolve(dir, newName)
        console.log('new  path  ', newPath)
        console.log('\n')
    
        await rename(oldPath, newPath);
    }
}

main();

Result