Magix Sound Forge Pro 18 Suite -win- Upd | Recent × 2024 |

MAGIX and the software name are proper, so they stay.

Putting it all together:

"customer support" can be "customer support|client care|user services". MAGIX SOUND FORGE Pro 18 Suite -WiN-

"Email address" could be e-mail, but the user specified all words with three alternatives. Maybe "email address" should be kept as one unit, but perhaps split into "email" and "address". However, the instruction says "all words with 3 alternatives", so perhaps each word in the sentence that isn't a proper noun should be replaced. This could be error-prone unless the user provides the exact words. MAGIX and the software name are proper, so they stay

Also, the user wants the text only, so no markdown. Just the sentences with the syn1 format. I'll make sure each line is correctly formatted and that the synonyms flow naturally within the sentences. Maybe "email address" should be kept as one