Yes.
Your version cannot be that old then. Every now and then a new version comes along that does not allow a free upgrade.
The most recent version before Search 8 was 6.7.4. It was released last June and was just a tweak on previous 6.7X incarnations. And that is quite some years old now.
X1 version 6 is a good five years old! Then again, the last time X1 introduced a change in the licensing regime seems to have been in 2009, when they moved to a 16-character licence.