How to clear plugins from memory/cache

Hi

I´m developing new plugins for 2.0 but I find it very hard to get the old version fully out of memory by uninstalling the plugin.

Any good solutions to clear a installed plugin totally ?

example: I install a plugin containing a string ShippedFromZipPostalCode

Then i make a new build/version without the string(because I didn´t need it) ShippedFromZipPostalCode then I get an error: Method not found: 'System.String Nop.Plugin.Shipping.DKPost.Models.DKPostShippingModel.get_ShippedFromZipPostalCode()'

And I have build and installed the new version (first uninstalled the old and clear cache).

And the string is for sure away from my code.