autodesk inventor 2015 loads then disappears

In Inventor customisation means learning VBA. i honestly can't see why inventor would be the prefered option over someting like Mechanical Desktop. I have to admit, i admire the ability to use reference data in drawings, but the few advantages i've seen FAAAAR outweigh the disadvantages. it means that if you decide to change a part, everything else is uneffected. mechanical desktop on the other hand has simple commands. then if you decide to change something back, you do it all again. otherwise when you change a dimension, your mate constraints chuck a spazz, and you spend the next 5 mins correcting your constraints. WOOOPTY FARKING DOOO!! so far i've found that you need to put SOOOo much effort into constructing your model in such a way as to predict any changes your likely to make. my biggest gripe is that everytime i tell someone how much better mechanical desktop is, they say 'yeah. Okay, so i'm not gonna claim to be a CAD expert of any degree, i've been drafting now for just over a year, spent 6 months+ working with Mechanical Desktop, and managed to learn crap loads in that time, and have spent the last 4months or so pulling my hair out with inventor.

don't wanna turn it it into a full scale flame war.

Autodesk inventor 2015 loads then disappears