I looked at the link and it seems the update is giving people errors, that does not mean the program is failing/ending like your title suggests though.
I have never used this program before as it's based around iOS but the thing i noticed was that it is based around XCode and native apps. So they probably need to test the releases they make more but i don't see why this means it's ending or anything as that would probably get fixed.
The version of GameSalad you are linking to is also doing a different thing to what Construct2 does as C2 converts to iPad etc from HTML5 using PhoneGap rather than making native apps directly.