Hi Bride, and welcome on this board.
Sorry you're encountering such issue.
We had a similar one in the past, which has been solved by updating graphics card driver.
In the meantime, i saw that you contacted support team, and they answered to you at time of writing.
Please ensure that graphics card driver( what is the exact model of your card?) and buchla easel V are up-to-date (current Buchla Easel V version is 1.2.1.1782)
hope it helps,
cheers,