** Maker of Avid video editing software's shares AVID.O
rise 11.7% to $10.30 in extended trading
** If gains hold, stock to open at 4-year high after co
beats Q1 EPS, rev estimates, helped by growth in its products
unit
** Backs FY2019 forecast for rev, adj. EBITDA and free cash
flow; Sees Q2 rev between $97 mln-105.5 mln, the mid point of
which is slightly below est
** AVID shares nearly doubled this year
(Reporting by Vibhuti Sharma in Bengaluru)
((RM: vibhuti.sharma.thomsonreuters.com@reuters.net))