There seems to be a problem with the 4.91 (and 4.91 SP1) client.
If the search path contains non-English chars you will get a "You do not
have sufficient rights to complete this operation" when doing "Salvage".
Works ok with 4.90 and if you replace the, in my case, ĺ,ä or ö with a, a
and o then you can do "Salvage" with 4.91.
Tyréns AB, Sweden