Hello, I decided to try the sony vegas version for a test, but it keeps showing the watermark, do you know if it can be removed during the redner or will it always be there in the free version?
Sony haven't been involved with Vegas for several years now. Presumably what you have is the 30 day trial version of Magix Vegas Pro. The watermark cannot be removed in the trial version.
I think that what you are referring to as a 'free version' is in fact the 30 days 'trial version'. Watermarking is quite common with trial versions and if you wish to remove watermarking, the idea is that you purchase the product.
Please note that Sony has had nothing to do with Vegas Pro since Vegas Pro 13 some 9 years ago - please see https://www.vegascreativesoftware.info/us/forum/sony-vegas-vs-vegas--119881/