No. You shouldn't delete the folder, you should delete the text before installing. As in, select the RTW folder, then delete the text within the parentheses (and the parentheses themselves). So:
* Install EB 1.1 into <RTW>.
* Install EB 1.2 into <RTW>.
Not:
* Install EB 1.1 into <RTW>.
* Install EB 1.2 into <RTW>\[first select the RTW folder where you installed EB, then delete this].
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