Dear jerry2,
1. If I buy now and new version appears soon, do I have to buy again?
Minor version upgrade will be free. We may charge the upgrade free for major version upgrade.
2. I meant image uploade in RTE like image/file manager one, not the uploader that is a separate product. Can I somehow use the file/image manager separately as it seems there is no product with that functionality available from you.
Thank you for asking