Q:
About 32 bit and 64 bit clients
A:
The Gw2.dat file residing next to the game’s executable(s) is shared among the two clients, so in theory you could just copy that one back and forth. If you want to avoid the copying, you can modify the shortcut to tell it to load it from your external hard drive too. There are instructions on the wiki. Specifically, you’d be interested in the -dat [string] switch.
Another thing you could do is to always launch the 32-bit client. If you’re on a 64-bit system, starting today it will just launch the 64-bit executable instead. So on your home machine, it would launch the 64-bit client while at work it would remain on the 32-bit client.
For the 32 bit you will need to put -32 in your command line.
To be clear, that is only necessary if you’re running it on a 64-bit system with 4 GB or more of RAM, and still want to use the 32-bit client.
Good to know and thanks for the answer