Bultra 4.0 is the latest version that came out until the first Bulgarian translator from English to Bulgarian. The program was pretty good for its time, but in recent years began to fall behind other programs in the area. For the moment there is no information about the fate of this program if the is going to be an update or not. It is not known and there is no information from the manufacturer.
The program is paid and costs about 15 levs. This is why it is not recommended to use it. Free programs like WebTrance and Babylon will do a much better job.