I’ve just send the money through international transfer. Since i don’t have a credit card i understand it will take 5-10 days for my product to be available.Can I still download the trial version without a problem for the time it takes for my order to be filled? I understand the trial version is version 3.1 rather than the latest version. Will this cause any trouble once i install my actual bought version in a week or so?
No problems at all. 3.5 is not aware of 3.1 in any way. Having 3.1 on your system will not affect installation or activation of 3.5.
Thanks for the swift reply. I read another thread after posting which sort of answered my question but still better safe than sorry. 
Can’t wait for my 3.5 version but playing around with the demo will give me enough practice until then.