There's only a minor chance your LW main settings would be changed. Perhaps things like program interface size, columns to show etc might be lost. At worst, your shares information might be lost.

In case you wished to know, the important files to backup from the LW preferences folder are: (note: you may not see the .dat extension if your system is set not to show file extensions:)
library5.dat = lists all your "shared" files. (I occasionally back this up, because I have 3 sets of shares for different purposes. eg: mostly music, or mostly videos, etc. Also in case something happens, I can always use the backup.)
library.dat = lists sensitive folders & files not to share. This file is not so important. (LW 4 used this file-name for the equivalent of library5.dat's purpose.)
downloads.dat = keeps record of the file download history & % downloaded of each file downloading. This is a very important file.

These files should never be returned to the LW preferences folder to replace others when LW is open, else they will simply be written over with whatever settings LW is presently using.

spam.dat = keeps record of types of files marked as spam.
tables.props = lists custom set tables & their widths.
limewire.props = General settings. Includes interface size, filtered extensions & keyword filter, banned ip addresses, up/download settings, etc.
gnutella.net = connection file.
fileurns.cache, not sure the purpose, but related to files "shared". This one could be worth backing up if backing up library5.dat
ttdata.cache, not sure the purpose of this file.

I occasionally get this error also in the Upload window. In LW 4 I think it usually meant the file was no longer being shared. For LW 5, I'm not sure what it means. I'd be purely guessing the cause.

I've discovered a little more about the "Invalid Request" message. Whilst I suggested this was previously known to happen when the upload file has been removed from the shared folder since after beginning the LW session, this is also true, I tested it. The files that seem to get that message in general seem to be incomplete files. With so many shares I didn't notice until now. LW 5.5 & I'm guessing the earlier LW 5 versions also, had no user control over whether incomplete files were shared using the partial-file-sharing technique. Partial-file-sharing is done by default in LW 5. In LW 4, the user had a choice whether to allow partial-file-sharing or not. Partial-file-sharing is where you share parts of the file as you are downloading the file. Much of the file transfers on the gnutella network is done via this technique. Torrents also use this same partial file sharing technique.

I'm "guessing" it may be related to upload settings, I'm not sure if partial-file-sharing in LW 5.5 takes into account upload slots & bandwidth set by the user, but either or both of these things may be affecting it. Once I set my upload slots lower, I received this message. When I set my upload bandwidth down very low, the message seemed to come very frequently. And this was via mostly different users for the same incomplete file I was still downloading. I don't usually cut my bandwidth down by much, but I do sometimes cut my upload slots if several large files such as videos are being uploaded. Means they get faster & regular speeds. Otherwise for some reason, if I have many small files being uploaded at same time as several very large ones with many upload requests, my upload bandwidth jumps all about even down to zero at times. Odd. But on this occasion it was purely an experiment where I cut the bandwidth down very low.

My only other thought is, the users programs are requesting parts of the incomplete file I do not yet have. And LW is mistakenly notifying via the incomplete window about this error. In the last example, I had 25-35% of the (video) file completed.



lol just after posting this I noticed a regular shared music concert video file I have with same message in upload window. Then a small file with same message a few minutes later despite pushing my bandwidth back up. My above hypothesis was was perhaps partially correct lol, it might be related to error messages within the program, not enough slots or not enough bandwidth, but the messages being mistakenly reported to the upload window perhaps. The image below was after a couple greedy people tried to select many files to download at once. A & B were about 5 mins apart.



And then another different incomplete file with same message a couple mins apart, whilst a couple people were peaking my upload bandwidth with music & video uploads. Perhaps this post does not say anything. lol Anybody with any ideas?

Edit 3 July 2011:
(Edit August) I had thought problem might be caused by using LW 4's old preferences with no to partial file sharing. But after removing this line from the preferences, still seem to get the error. I suspect the problem is a bug. The Invalid Request seems to occur for both incomplete & shared files. Especially but not only if the person is trying to upload too many files. Seems to happen mostly if they are waiting in queue for a slot.

This is one reason LPE always seems to run best upon a clean install with no previous LW preferences. That includes removing LW Basic or LW Pro preferences.

ciao a tutti

I would like to thank File_Girl71

and if you change a setting in tools>options>upload/download Limits (configure) you will get files much faster (if your ISP don't throttle you down)
see attached

__________________
Have A Nice Day

is there a guide somewhere for LW pirate? the guide for the original is no longer accessible. thank you.

AFAIK there isn't a user guide for LPE.

If you have any questions about using LW then feel free to post them here & people will help you where they can

I'll do that. But if somebody here by chance downloaded the guide that was available for LW Pro, perhaps he could make it available here or as a torrent. That would be really nice. Thanks.

LW did not have a downloadable guide for LW 5. The previous downloadable guide they had was for early LW 4.
The reason they refused to make it downloadable was they said to me, the program goes through so many changes so frequently, meaning one downloadable version might be out of date within months. And LW 5 did go through considerable changes over it's time. And had considerable differences to LW 4 on top of that.

I do definitely need to add & upgrade some 'How to do's' with LW 5. I've been thinking recently about posting advice on general downloading with LW 5. Tips & tools that some people don't realise, also advice about how best to go about things.

Some things in LW 5 were never completed by the developers, and at least for MacOSX there are some remaining bugs. Not sure if these apply to Windows but my guess is at least a couple of them do. Of course these bugs passed across to LPE. I've used both LW 5.5 Pro & LPE in depth.

OK that evolution reloaded link is now dead.

Some links did die, that's why the first post on the first page of this thread was updated more than once.
There's also File_Girl's version in the following post. The AVG no longer works in any version of LW, so no point in even having it. File_Girl removed it before the AV stopped working.