Easy switch between product type

When you create a new product you must select from General, not for sale, or free shipping, etc. I NEED to be able to switch back and forth between these.

Creating a new product, uploading a new picture, copying the description, previewing, uploading, then going to the cart, loging in, re-pasting the review and finally deleting the other category is just not a working process. It leads to errors, wasted time, and I always mistakenly create a new product in the wrong category then have to start over. The worst is switching over 50 products in 1 night.

Any suggestions, is there a solution?

Thank you and have a good day.

USE EXTREME CAUTION WITH THIS!!!!!!*
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IF AND ONLY IF the product types you're switching between STORE NO ADDITIONAL DATA unique to the product type, you can manually change the products_type number in the products table for that product.

HOWEVER, IF THE PRODUCT TYPE STORES ANY UNIQUE DATA, you SHOULD NEVER MANUALLY CHANGE the products_type number; otherwise you will end up with serious problems resulting from corrupt data.

I think the data stored between the two product types is identical. What kind of serious problems with corrupt data? Will i only loose the data in that product that I try to switch to the other product? Or will i loose all products or multiple ones?

Also where is the products_type number located?

Thank you