Create-reapeaks-in-selected-folder.zip
Try this it will do one selected folder at a time by selecting the audio file type.
So if you select an RT/RD wma file it will create reapeaks for all wma files in that folder, or if wav or m4a or aif of flac etc..

This is the batch version that does both RT & RD folders but may take a long time
Create-reapeaks-in-folder.zip

Updated: Create-reapeaks-in-folder.zip
Create-reapeaks-in-selected-folder.zip
Updated with reaper.PCM_Source_Destroy(src) so RAM don't build up.
Also: Create-reapeaks-in-subdirectories-for-media-type-(Win).zip this will do all sub directories in a single folder.

Update: Create-reapeaks-in-folder.zip

Works perfectly.Thanks.

Thanks for trying and feedback to make it work right.