CREATE TABLE table_58999 ("Title" TEXT, "Developer" TEXT, "Genre" TEXT, "Release date" TEXT, "Version" FLOAT)

What is the highest Version, when Release Date is '2011-04-01'?
SELECT MAX("Version") FROM table_58999 WHERE "Release date" = '2011-04-01'
SELECT MAX("Version") FROM "table_58999" WHERE "Release date" = '2011-04-01'