EasyPopulate 4.0 Support Thread

[tedm]

Hi everyone,
I'm new to both eCommerce and Zen Cart so I'm making a few mistakes but getting there slowly.
I'm using [the very wonderful] Easy Populate 4 with my Zen Cart 1.5 install to add/update about 1600 products to my fledgling site.
All is good so far but I've come across an issue that I'm sure is user error but I could do with some advice.
My products are clothes so I want to upload size and colour options for each product.

I've got two csv files (one for sizes and the other for colours) in the following format:
"v_products_model","Colours","v_products_options_type","v_products_options_value s_name","EOREOR"
"AD009","Colours","0","Black,Coast (Light Blue),Navy,University Red,White","EOREOR"
"AD012","Colours","0","Black,Navy,Red,White","EOREOR"
"AD013","Colours","0","Black/White*,Coast/White,Navy/White*,Neon/Precinct,Pirahna/White,Precinct/White,White/Black*","EOREOR"

and
"v_products_model","v_products_options_values_name","v_products_options_type","v _products_options_values_name","EOREOR"
"AD009","Sizes","0","2XL,L,M,S,XL","EOREOR"
"AD012","Sizes","0","2XL,L,M,S,XL","EOREOR"
"AD013","Sizes","0","2XL,L,M,S,XL","EOREOR"

Now I realised too late that the first line of my colours file read:
"v_products_model","Colours"
instead of
"v_products_model","v_products_options_values_name"

but the colours showed just fine on the product page, but when I imported the Sizes file all the size information was added to the Colour information in the same dropdown box.

I had not entered anything regarding options via the Zen Cart config and was expecting EP to do all this for me.
So firstly, what have I done wrong to cause this error and secondly how can I delete all the imported options data and start again?

Thanks in advance.