I have just scaned 243 games on CF0:/Games/A/ CF0:/Games/B/ (FAT32)
In fact I have scanned the KG collection until Beneath a steal sky.
I had no crash.
How many games do you have ?
Your crash are on an Amiga FS or a directory hosted on Windows/Linux/OSX.... ????
About Merging why not, we will make a poll
for categories, I don't know yet.
Edit: I'm going to post my latest version.