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How a wrongly selected source language be corrected?

Recently I purchased SDL 2019 Freelance Version and at the time of installation the software asked me to select 5 languages with a source language.  My mother tongue is Tamil(India) and selected instead of English (US).  After installation I could not find the English language at all and then I realized my mistake.  Is there any possibility to change the source language to English(US) instead of Tamil(India)?  If so, please inform me without reinstalling the software again.

Thanks.