If you would like to change the label that appears on the browser window title, then you can edit this via the Asset Bank interface here:

Admin > Content > Common Terms [edit] > Company Name [edit]

There are also some instances where "Asset Bank" is referenced to appear within some page text, this can be edited here:

Admin > Content > Common Terms [edit] > Application Name [edit]

Finally, you can edit all other references to Asset Bank that appear within normal page copy here:

Admin > Content > Page Copy [edit] > (e.g. Home Page Welcome text)