I recently decided to jailbreak my old pw1 which was running 5.6.1.1.
By following this guide, I first downgraded the system to 5.3.3 and then installed the jb provided here. Afterwards I installed kual to use some plugins.
My question is, can I upgrade my kindle again to the newest version (5.6.1.1) or would this disable the jb? If i can upgrade it, how would I do it, simply download the proper file and flash it like I did with the 5.3.3 one?
Thanks in advance and sorry if this was asked before. I couldn't find the answer

I want to update back again, because I kind of miss the folders to organize my library...
edit: just realized that the folders can still be created in the old version, but were simply deleted when downgrading. would still upgrade to the newest version if possible
edit2: somehow the downgrade of my kindle did mess up the collections. All my old collections do no longer show, but when I sort by collections, the books which have actually been in these old collections which are no longer visible do not show up anymore...