Hello,
it looks like bug on our side and I'm not sure that marlew advice will help. Same problem will be on paid version.
If you want to translate it to your language by yourself, look at:
FAQ translation
We will look on this problem and maybe repair it for next release.
1. You can use 2 different websites. One for main website and second as testing website. If your site uses multiple domain names on front-end, use the primary one, which is used to access Joomla backend.
2. Yes, it is. It should be possible to test on free version. You can specify more prices for different period or daytime.
3. After 1 year will be sent an email to you with license renewal offer. You don't need to pay full price. It will probably cost only around 30%.
4. 49 or 99 EUR are final prices for our booking extensions. You don't need to pay special VAT or something like that. Only if you select Bank Transfer as a payment method then you will pay small fee.