I thought that something like "(?siU)Dirs : (.*) {[0-9]+:[0-9]+}" or "(?siU)Dirs : ([0-9]+:[0-9]+) {[0-9]+:[0-9]+}" would work, however I just get my substitute. (Unfortunately, the wiki link to regex for Rainmeter went to a 404)
So, how would I say in regex "Parse the number of an unknown size between 'Dirs :' and the next number of unknown size"