Is there any way to re install the game as 32 bit? I'm stuck with my crappy laptop atm and it can't seem to run the 64 bit horizons. Can I just downgrade and play without the content of horizons which I'm assuming can only be installed in 64 bit?
.. but jut how "crappy" IS your laptop?
Does it have a 64-bit-capable CPU? Is it running on a 64-bit OS (eg Win 8.1)?
Does it have MORE THAN 4Gb RAM?
If you bought the Horizons release, I don't think you'll have the 32-bit non-Horizons "as well", since the Horizons release includes the base game.
In which case, contact Frontier, and be sure to have whatever proof of purchase HANDY. If you bought online and downloaded, you should have some email confirmation and/or invoice. Ordered the box? I hope you kept the delivery note. Get in touch with them (you may start via the Frontier TICKETing part of the website) and let them know your predicament, and that you'd like to play the non-Horizons flight-only..
With any luck, as long as you can prove purchase e.g. of Horizons package, they might just pop a key into your account for you to download the earlier.
If you bought an earlier release, and added Horizons after, then you should have all you need.
Good luck.